331222905 has 64 divisors (see below), whose sum is σ = 642432000. Its totient is φ = 160932096.

The previous prime is 331222901. The next prime is 331222907. The reversal of 331222905 is 509222133.

It is not a de Polignac number, because 331222905 - 2² = 331222901 is a prime.

It is a super-2 number, since 2×331222905² = 219417225593278050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (331222901) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 137451 + ... + 139839.

It is an arithmetic number, because the mean of its divisors is an integer number (10038000).

Almost surely, 2^331222905 is an apocalyptic number.

It is an amenable number.

331222905 is a deficient number, since it is larger than the sum of its proper divisors (311209095).

331222905 is a wasteful number, since it uses less digits than its factorization.

331222905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495 (or 2489 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 331222905 is about 18199.5303510832. The cubic root of 331222905 is about 691.8948859965.

The spelling of 331222905 in words is "three hundred thirty-one million, two hundred twenty-two thousand, nine hundred five".