1153312220 has 24 divisors (see below), whose sum is σ = 2500084608. Its totient is φ = 446443200.

The previous prime is 1153312219. The next prime is 1153312229. The reversal of 1153312220 is 222133511.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1153312192 and 1153312201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153312229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 929471 + ... + 930710.

It is an arithmetic number, because the mean of its divisors is an integer number (104170192).

Almost surely, 2^1153312220 is an apocalyptic number.

1153312220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1153312220 is an abundant number, since it is smaller than the sum of its proper divisors (1346772388).

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

1153312220 is a wasteful number, since it uses less digits than its factorization.

1153312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860221 (or 1860219 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1153312220 is about 33960.4508215071. The cubic root of 1153312220 is about 1048.6944378151.

Adding to 1153312220 its reverse (222133511), we get a palindrome (1375445731).

The spelling of 1153312220 in words is "one billion, one hundred fifty-three million, three hundred twelve thousand, two hundred twenty".