331888885 has 4 divisors (see below), whose sum is σ = 398266668. Its totient is φ = 265511104.

The previous prime is 331888849. The next prime is 331888897. The reversal of 331888885 is 588888133.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 106378596 + 225510289 = 10314^2 + 15017^2 .

It is a cyclic number.

It is not a de Polignac number, because 331888885 - 2⁷ = 331888757 is a prime.

It is a super-2 number, since 2×331888885² = 220300463973086450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 33188884 + ... + 33188893.

It is an arithmetic number, because the mean of its divisors is an integer number (99566667).

Almost surely, 2^331888885 is an apocalyptic number.

It is an amenable number.

331888885 is a deficient number, since it is larger than the sum of its proper divisors (66377783).

331888885 is an equidigital number, since it uses as much as digits as its factorization.

331888885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66377782.

The product of its digits is 1474560, while the sum is 52.

The square root of 331888885 is about 18217.8177891865. The cubic root of 331888885 is about 692.3582996703.

The spelling of 331888885 in words is "three hundred thirty-one million, eight hundred eighty-eight thousand, eight hundred eighty-five".