253649251 has 2 divisors, whose sum is σ = 253649252. Its totient is φ = 253649250.

The previous prime is 253649239. The next prime is 253649257. The reversal of 253649251 is 152946352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253649251 - 2⁹ = 253648739 is a prime.

It is a super-2 number, since 2×253649251² = 128675885065722002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 253649251.

It is not a weakly prime, because it can be changed into another prime (253649257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126824625 + 126824626.

It is an arithmetic number, because the mean of its divisors is an integer number (126824626).

Almost surely, 2^253649251 is an apocalyptic number.

253649251 is a deficient number, since it is larger than the sum of its proper divisors (1).

253649251 is an equidigital number, since it uses as much as digits as its factorization.

253649251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The square root of 253649251 is about 15926.3696742227. The cubic root of 253649251 is about 633.0109093536.

The spelling of 253649251 in words is "two hundred fifty-three million, six hundred forty-nine thousand, two hundred fifty-one".