331031442 has 16 divisors (see below), whose sum is σ = 756643392. Its totient is φ = 94580400.

The previous prime is 331031399. The next prime is 331031483. The reversal of 331031442 is 244130133.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3940809 + ... + 3940892.

It is an arithmetic number, because the mean of its divisors is an integer number (47290212).

Almost surely, 2^331031442 is an apocalyptic number.

331031442 is an abundant number, since it is smaller than the sum of its proper divisors (425611950).

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

331031442 is a wasteful number, since it uses less digits than its factorization.

331031442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7881713.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 331031442 is about 18194.2694824497. The cubic root of 331031442 is about 691.7615439662.

Adding to 331031442 its reverse (244130133), we get a palindrome (575161575).

The spelling of 331031442 in words is "three hundred thirty-one million, thirty-one thousand, four hundred forty-two".