331608531 has 4 divisors (see below), whose sum is σ = 442144712. Its totient is φ = 221072352.

The previous prime is 331608523. The next prime is 331608551. The reversal of 331608531 is 135806133.

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

It is not a de Polignac number, because 331608531 - 2³ = 331608523 is a prime.

It is a super-2 number, since 2×331608531² = 219928435663955922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331608551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55268086 + ... + 55268091.

It is an arithmetic number, because the mean of its divisors is an integer number (110536178).

Almost surely, 2^331608531 is an apocalyptic number.

331608531 is a deficient number, since it is larger than the sum of its proper divisors (110536181).

331608531 is a wasteful number, since it uses less digits than its factorization.

331608531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110536180.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 331608531 is about 18210.1216635145. The cubic root of 331608531 is about 692.1632945463.

The spelling of 331608531 in words is "three hundred thirty-one million, six hundred eight thousand, five hundred thirty-one".