321140331 has 24 divisors (see below), whose sum is σ = 485319744. Its totient is φ = 204416640.

The previous prime is 321140327. The next prime is 321140341. The reversal of 321140331 is 133041123.

321140331 is a `hidden beast` number, since 321 + 14 + 0 + 331 = 666.

It is not a de Polignac number, because 321140331 - 2² = 321140327 is a prime.

It is a super-2 number, since 2×321140331² = 206262224389579122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321140341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8085 + ... + 26601.

It is an arithmetic number, because the mean of its divisors is an integer number (20221656).

Almost surely, 2^321140331 is an apocalyptic number.

321140331 is a deficient number, since it is larger than the sum of its proper divisors (164179413).

321140331 is a wasteful number, since it uses less digits than its factorization.

321140331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18611 (or 18608 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 321140331 is about 17920.3886955613. The cubic root of 321140331 is about 684.8018898921.

Adding to 321140331 its reverse (133041123), we get a palindrome (454181454).

The spelling of 321140331 in words is "three hundred twenty-one million, one hundred forty thousand, three hundred thirty-one".