249494931 has 32 divisors (see below), whose sum is σ = 423288320. Its totient is φ = 142277472.

The previous prime is 249494911. The next prime is 249494939. The reversal of 249494931 is 139494942.

It is not a de Polignac number, because 249494931 - 2⁵ = 249494899 is a prime.

It is a super-2 number, since 2×249494931² = 124495441189389522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (249494939) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120501 + ... + 122553.

It is an arithmetic number, because the mean of its divisors is an integer number (13227760).

Almost surely, 2^249494931 is an apocalyptic number.

249494931 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

249494931 is a deficient number, since it is larger than the sum of its proper divisors (173793389).

249494931 is a wasteful number, since it uses less digits than its factorization.

249494931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712 (or 2706 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 249494931 is about 15795.4085417250. The cubic root of 249494931 is about 629.5360075617.

The spelling of 249494931 in words is "two hundred forty-nine million, four hundred ninety-four thousand, nine hundred thirty-one".