1225163232 has 168 divisors, whose sum is σ = 3743175240. Its totient is φ = 394087680.

The previous prime is 1225163213. The next prime is 1225163243. The reversal of 1225163232 is 2323615221.

It is a happy number.

1225163232 is a `hidden beast` number, since 1 + 2 + 25 + 1 + 632 + 3 + 2 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1225163196 and 1225163205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 675607 + ... + 677417.

It is an arithmetic number, because the mean of its divisors is an integer number (22280805).

Almost surely, 2^1225163232 is an apocalyptic number.

1225163232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225163232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1871587620).

1225163232 is an abundant number, since it is smaller than the sum of its proper divisors (2518012008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225163232 is an equidigital number, since it uses as much as digits as its factorization.

1225163232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868 (or 1845 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1225163232 is about 35002.3318080382. The cubic root of 1225163232 is about 1070.0350039499.

Adding to 1225163232 its reverse (2323615221), we get a palindrome (3548778453).

It can be divided in two parts, 1225163 and 232, that added together give a triangular number (1225395 = T₁₅₆₅).

The spelling of 1225163232 in words is "one billion, two hundred twenty-five million, one hundred sixty-three thousand, two hundred thirty-two".