331401132 has 30 divisors (see below), whose sum is σ = 866348868. Its totient is φ = 110466936.

The previous prime is 331401121. The next prime is 331401139. The reversal of 331401132 is 231104133.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (331401139) 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, 511098 + ... + 511745.

Almost surely, 2^331401132 is an apocalyptic number.

It is an amenable number.

331401132 is an abundant number, since it is smaller than the sum of its proper divisors (534947736).

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

331401132 is a wasteful number, since it uses less digits than its factorization.

331401132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022859 (or 1022848 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 331401132 is about 18204.4261650841. The cubic root of 331401132 is about 692.0189638070.

Adding to 331401132 its reverse (231104133), we get a palindrome (562505265).

The spelling of 331401132 in words is "three hundred thirty-one million, four hundred one thousand, one hundred thirty-two".