331494931 has 4 divisors (see below), whose sum is σ = 332755632. Its totient is φ = 330234232.

The previous prime is 331494907. The next prime is 331494937. The reversal of 331494931 is 139494133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139494133 = 127 ⋅1098379.

It is a cyclic number.

It is not a de Polignac number, because 331494931 - 2⁹ = 331494419 is a prime.

It is a super-2 number, since 2×331494931² = 219777778557389522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331494937) 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, 629956 + ... + 630481.

It is an arithmetic number, because the mean of its divisors is an integer number (83188908).

Almost surely, 2^331494931 is an apocalyptic number.

331494931 is a deficient number, since it is larger than the sum of its proper divisors (1260701).

331494931 is a wasteful number, since it uses less digits than its factorization.

331494931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260700.

The product of its digits is 34992, while the sum is 37.

The square root of 331494931 is about 18207.0022518810. The cubic root of 331494931 is about 692.0842467903.

The spelling of 331494931 in words is "three hundred thirty-one million, four hundred ninety-four thousand, nine hundred thirty-one".