257470431 has 4 divisors (see below), whose sum is σ = 343293912. Its totient is φ = 171646952.

The previous prime is 257470393. The next prime is 257470453. The reversal of 257470431 is 134074752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 257470431 - 2¹³ = 257462239 is a prime.

It is a super-2 number, since 2×257470431² = 132582045678651522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257470392 and 257470401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257470231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42911736 + ... + 42911741.

It is an arithmetic number, because the mean of its divisors is an integer number (85823478).

Almost surely, 2^257470431 is an apocalyptic number.

257470431 is a deficient number, since it is larger than the sum of its proper divisors (85823481).

257470431 is an equidigital number, since it uses as much as digits as its factorization.

257470431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85823480.

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 257470431 is about 16045.8851734643. The cubic root of 257470431 is about 636.1738108277.

The spelling of 257470431 in words is "two hundred fifty-seven million, four hundred seventy thousand, four hundred thirty-one".