257147495 has 16 divisors (see below), whose sum is σ = 348239520. Its totient is φ = 180566400.

The previous prime is 257147489. The next prime is 257147497. The reversal of 257147495 is 594741752.

It is not a de Polignac number, because 257147495 - 2¹² = 257143399 is a prime.

It is a super-2 number, since 2×257147495² = 132249668369550050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257147497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79016 + ... + 82205.

It is an arithmetic number, because the mean of its divisors is an integer number (21764970).

Almost surely, 2^257147495 is an apocalyptic number.

257147495 is a deficient number, since it is larger than the sum of its proper divisors (91092025).

257147495 is a wasteful number, since it uses less digits than its factorization.

257147495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161266.

The product of its digits is 352800, while the sum is 44.

The square root of 257147495 is about 16035.8191246971. The cubic root of 257147495 is about 635.9077228238.

The spelling of 257147495 in words is "two hundred fifty-seven million, one hundred forty-seven thousand, four hundred ninety-five".