249795631 has 4 divisors (see below), whose sum is σ = 253523992. Its totient is φ = 246067272.

The previous prime is 249795629. The next prime is 249795659. The reversal of 249795631 is 136597942.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 249795631 - 2¹ = 249795629 is a prime.

It is a super-2 number, since 2×249795631² = 124795714533376322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249795131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1864080 + ... + 1864213.

It is an arithmetic number, because the mean of its divisors is an integer number (63380998).

Almost surely, 2^249795631 is an apocalyptic number.

249795631 is a deficient number, since it is larger than the sum of its proper divisors (3728361).

249795631 is an equidigital number, since it uses as much as digits as its factorization.

249795631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3728360.

The product of its digits is 408240, while the sum is 46.

The square root of 249795631 is about 15804.9242642918. The cubic root of 249795631 is about 629.7888189471.

The spelling of 249795631 in words is "two hundred forty-nine million, seven hundred ninety-five thousand, six hundred thirty-one".