331230981 has 16 divisors (see below), whose sum is σ = 461623680. Its totient is φ = 210862080.

The previous prime is 331230979. The next prime is 331230997. The reversal of 331230981 is 189032133.

It is not a de Polignac number, because 331230981 - 2¹ = 331230979 is a prime.

It is a super-2 number, since 2×331230981² = 219427925548444722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331230901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40485 + ... + 47973.

It is an arithmetic number, because the mean of its divisors is an integer number (28851480).

Almost surely, 2^331230981 is an apocalyptic number.

It is an amenable number.

331230981 is a deficient number, since it is larger than the sum of its proper divisors (130392699).

331230981 is a wasteful number, since it uses less digits than its factorization.

331230981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8156.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 331230981 is about 18199.7522235881. The cubic root of 331230981 is about 691.9005092969.

The spelling of 331230981 in words is "three hundred thirty-one million, two hundred thirty thousand, nine hundred eighty-one".