253668251 has 2 divisors, whose sum is σ = 253668252. Its totient is φ = 253668250.

The previous prime is 253668119. The next prime is 253668281. The reversal of 253668251 is 152866352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253668251 - 2¹⁸ = 253406107 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (253668281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126834125 + 126834126.

It is an arithmetic number, because the mean of its divisors is an integer number (126834126).

Almost surely, 2^253668251 is an apocalyptic number.

253668251 is a deficient number, since it is larger than the sum of its proper divisors (1).

253668251 is an equidigital number, since it uses as much as digits as its factorization.

253668251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 38.

The square root of 253668251 is about 15926.9661580604. The cubic root of 253668251 is about 633.0267145215.

The spelling of 253668251 in words is "two hundred fifty-three million, six hundred sixty-eight thousand, two hundred fifty-one".