249616231 has 2 divisors, whose sum is σ = 249616232. Its totient is φ = 249616230.

The previous prime is 249616229. The next prime is 249616249. The reversal of 249616231 is 132616942.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249616231 - 2¹ = 249616229 is a prime.

It is a super-2 number, since 2×249616231² = 124616525557290722, which contains 22 as substring.

Together with 249616229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249616271) 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 as a sum of consecutive naturals, namely, 124808115 + 124808116.

It is an arithmetic number, because the mean of its divisors is an integer number (124808116).

Almost surely, 2^249616231 is an apocalyptic number.

249616231 is a deficient number, since it is larger than the sum of its proper divisors (1).

249616231 is an equidigital number, since it uses as much as digits as its factorization.

249616231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 249616231 is about 15799.2477985504. The cubic root of 249616231 is about 629.6380141039.

The spelling of 249616231 in words is "two hundred forty-nine million, six hundred sixteen thousand, two hundred thirty-one".