331670642 has 8 divisors (see below), whose sum is σ = 497690076. Its totient is φ = 165773952.

The previous prime is 331670611. The next prime is 331670657. The reversal of 331670642 is 246076133.

It can be written as a sum of positive squares in 2 ways, for example, as 326199721 + 5470921 = 18061^2 + 2339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×331670642² = 220010829529384328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331670599 and 331670608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23603 + ... + 34934.

Almost surely, 2^331670642 is an apocalyptic number.

331670642 is a deficient number, since it is larger than the sum of its proper divisors (166019434).

331670642 is a wasteful number, since it uses less digits than its factorization.

331670642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61372.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 331670642 is about 18211.8269813877. The cubic root of 331670642 is about 692.2065064127.

The spelling of 331670642 in words is "three hundred thirty-one million, six hundred seventy thousand, six hundred forty-two".