331942538 has 4 divisors (see below), whose sum is σ = 497913810. Its totient is φ = 165971268.

The previous prime is 331942487. The next prime is 331942543. The reversal of 331942538 is 835249133.

331942538 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 835249133 = 137 ⋅6096709.

It can be written as a sum of positive squares in only one way, i.e., 184878409 + 147064129 = 13597^2 + 12127^2 .

It is a super-2 number, since 2×331942538² = 220371697067762888, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82985633 + ... + 82985636.

Almost surely, 2^331942538 is an apocalyptic number.

331942538 is a deficient number, since it is larger than the sum of its proper divisors (165971272).

331942538 is a wasteful number, since it uses less digits than its factorization.

331942538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165971271.

The product of its digits is 77760, while the sum is 38.

The square root of 331942538 is about 18219.2902715775. The cubic root of 331942538 is about 692.3956064316.

The spelling of 331942538 in words is "three hundred thirty-one million, nine hundred forty-two thousand, five hundred thirty-eight".