331921152 has 90 divisors (see below), whose sum is σ = 989790648. Its totient is φ = 110633472.

The previous prime is 331921151. The next prime is 331921157. The reversal of 331921152 is 251129133.

It is a super-2 number, since 2×331921152² = 220343302290014208, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331921151) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12733 + ... + 28739.

Almost surely, 2^331921152 is an apocalyptic number.

331921152 is a gapful number since it is divisible by the number (32) 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 331921152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494895324).

331921152 is an abundant number, since it is smaller than the sum of its proper divisors (657869496).

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

331921152 is an equidigital number, since it uses as much as digits as its factorization.

331921152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16035 (or 16012 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 331921152 is about 18218.7033567156. The cubic root of 331921152 is about 692.3807364981.

The spelling of 331921152 in words is "three hundred thirty-one million, nine hundred twenty-one thousand, one hundred fifty-two".