331864402 has 8 divisors (see below), whose sum is σ = 500967756. Its totient is φ = 164875152.

The previous prime is 331864391. The next prime is 331864409. The reversal of 331864402 is 204468133.

It can be written as a sum of positive squares in 2 ways, for example, as 329458801 + 2405601 = 18151^2 + 1551^2 .

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

It is a super-2 number, since 2×331864402² = 220267962629635208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331864409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528133 + ... + 528760.

Almost surely, 2^331864402 is an apocalyptic number.

331864402 is a deficient number, since it is larger than the sum of its proper divisors (169103354).

331864402 is a wasteful number, since it uses less digits than its factorization.

331864402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057052.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 331864402 is about 18217.1458247443. The cubic root of 331864402 is about 692.3412744691.

The spelling of 331864402 in words is "three hundred thirty-one million, eight hundred sixty-four thousand, four hundred two".