257097371 has 4 divisors (see below), whose sum is σ = 261312144. Its totient is φ = 252882600.

The previous prime is 257097343. The next prime is 257097431. The reversal of 257097371 is 173790752.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257097371 is a prime.

It is a super-2 number, since 2×257097371² = 132198116350223282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257097311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2107295 + ... + 2107416.

It is an arithmetic number, because the mean of its divisors is an integer number (65328036).

Almost surely, 2^257097371 is an apocalyptic number.

257097371 is a deficient number, since it is larger than the sum of its proper divisors (4214773).

257097371 is an equidigital number, since it uses as much as digits as its factorization.

257097371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4214772.

The product of its (nonzero) digits is 92610, while the sum is 41.

The square root of 257097371 is about 16034.2561723330. The cubic root of 257097371 is about 635.8664024266.

The spelling of 257097371 in words is "two hundred fifty-seven million, ninety-seven thousand, three hundred seventy-one".