257046651 has 24 divisors (see below), whose sum is σ = 378181440. Its totient is φ = 168206976.

The previous prime is 257046641. The next prime is 257046653. The reversal of 257046651 is 156640752.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-257046651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257046653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156205 + ... + 157841.

It is an arithmetic number, because the mean of its divisors is an integer number (15757560).

Almost surely, 2^257046651 is an apocalyptic number.

257046651 is a deficient number, since it is larger than the sum of its proper divisors (121134789).

257046651 is a wasteful number, since it uses less digits than its factorization.

257046651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955 (or 1952 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 257046651 is about 16032.6744805725. The cubic root of 257046651 is about 635.8245852415.

The spelling of 257046651 in words is "two hundred fifty-seven million, forty-six thousand, six hundred fifty-one".