257090751 has 12 divisors (see below), whose sum is σ = 371501520. Its totient is φ = 171325440.

The previous prime is 257090749. The next prime is 257090761. The reversal of 257090751 is 157090752.

It is not a de Polignac number, because 257090751 - 2¹ = 257090749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257090761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29631 + ... + 37311.

It is an arithmetic number, because the mean of its divisors is an integer number (30958460).

Almost surely, 2^257090751 is an apocalyptic number.

257090751 is a deficient number, since it is larger than the sum of its proper divisors (114410769).

257090751 is a wasteful number, since it uses less digits than its factorization.

257090751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11406 (or 11403 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 257090751 is about 16034.0497379795. The cubic root of 257090751 is about 635.8609447386.

Subtracting from 257090751 its reverse (157090752), we obtain a palindrome (99999999).

The spelling of 257090751 in words is "two hundred fifty-seven million, ninety thousand, seven hundred fifty-one".