331909972 has 12 divisors (see below), whose sum is σ = 615009780. Its totient is φ = 156192896.

The previous prime is 331909969. The next prime is 331909979. The reversal of 331909972 is 279909133.

It can be written as a sum of positive squares in 2 ways, for example, as 113934276 + 217975696 = 10674^2 + 14764^2 .

It is a super-2 number, since 2×331909972² = 220328459026081568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331909979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2440447 + ... + 2440582.

It is an arithmetic number, because the mean of its divisors is an integer number (51250815).

Almost surely, 2^331909972 is an apocalyptic number.

It is an amenable number.

331909972 is a deficient number, since it is larger than the sum of its proper divisors (283099808).

331909972 is a wasteful number, since it uses less digits than its factorization.

331909972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4881050 (or 4881048 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 331909972 is about 18218.3965265882. The cubic root of 331909972 is about 692.3729626603.

The spelling of 331909972 in words is "three hundred thirty-one million, nine hundred nine thousand, nine hundred seventy-two".