249896631 has 16 divisors (see below), whose sum is σ = 344719584. Its totient is φ = 160902144.

The previous prime is 249896627. The next prime is 249896639. The reversal of 249896631 is 136698942.

It is not a de Polignac number, because 249896631 - 2² = 249896627 is a prime.

It is a super-2 number, since 2×249896631² = 124896652370300322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249896639) 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, 6991 + ... + 23423.

It is an arithmetic number, because the mean of its divisors is an integer number (21544974).

Almost surely, 2^249896631 is an apocalyptic number.

249896631 is a deficient number, since it is larger than the sum of its proper divisors (94822953).

249896631 is a wasteful number, since it uses less digits than its factorization.

249896631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16610.

The product of its digits is 559872, while the sum is 48.

The square root of 249896631 is about 15808.1191480834. The cubic root of 249896631 is about 629.8736884587.

The spelling of 249896631 in words is "two hundred forty-nine million, eight hundred ninety-six thousand, six hundred thirty-one".