1225331172 has 192 divisors, whose sum is σ = 3612672000. Its totient is φ = 356503680.

The previous prime is 1225331167. The next prime is 1225331201. The reversal of 1225331172 is 2711335221.

1225331172 is a `hidden beast` number, since 12 + 2 + 533 + 117 + 2 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2045329 + ... + 2045927.

It is an arithmetic number, because the mean of its divisors is an integer number (18816000).

Almost surely, 2^1225331172 is an apocalyptic number.

1225331172 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 1225331172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1806336000).

1225331172 is an abundant number, since it is smaller than the sum of its proper divisors (2387340828).

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

1225331172 is a wasteful number, since it uses less digits than its factorization.

1225331172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703 (or 695 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 1225331172 is about 35004.7307088628. The cubic root of 1225331172 is about 1070.0838936172.

Adding to 1225331172 its reverse (2711335221), we get a palindrome (3936666393).

The spelling of 1225331172 in words is "one billion, two hundred twenty-five million, three hundred thirty-one thousand, one hundred seventy-two".