257363651 has 2 divisors, whose sum is σ = 257363652. Its totient is φ = 257363650.

The previous prime is 257363621. The next prime is 257363653. The reversal of 257363651 is 156363752.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257363651 is a prime.

Together with 257363653, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (257363653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128681825 + 128681826.

It is an arithmetic number, because the mean of its divisors is an integer number (128681826).

Almost surely, 2^257363651 is an apocalyptic number.

257363651 is a deficient number, since it is larger than the sum of its proper divisors (1).

257363651 is an equidigital number, since it uses as much as digits as its factorization.

257363651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 38.

The square root of 257363651 is about 16042.5574956115. The cubic root of 257363651 is about 636.0858524651.

The spelling of 257363651 in words is "two hundred fifty-seven million, three hundred sixty-three thousand, six hundred fifty-one".