257454731 has 6 divisors (see below), whose sum is σ = 271718532. Its totient is φ = 243904140.

The previous prime is 257454727. The next prime is 257454739. The reversal of 257454731 is 137454752.

It is not a de Polignac number, because 257454731 - 2² = 257454727 is a prime.

It is a super-2 number, since 2×257454731² = 132565877028564722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257454739) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 356225 + ... + 356946.

It is an arithmetic number, because the mean of its divisors is an integer number (45286422).

Almost surely, 2^257454731 is an apocalyptic number.

257454731 is a deficient number, since it is larger than the sum of its proper divisors (14263801).

257454731 is an equidigital number, since it uses as much as digits as its factorization.

257454731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713209 (or 713190 counting only the distinct ones).

The product of its digits is 117600, while the sum is 38.

The square root of 257454731 is about 16045.3959440084. The cubic root of 257454731 is about 636.1608797223.

The spelling of 257454731 in words is "two hundred fifty-seven million, four hundred fifty-four thousand, seven hundred thirty-one".