256352697 has 12 divisors (see below), whose sum is σ = 371627620. Its totient is φ = 170283168.

The previous prime is 256352651. The next prime is 256352717. The reversal of 256352697 is 796253652.

256352697 is a `hidden beast` number, since 2 + 5 + 635 + 2 + 6 + 9 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 44475561 + 211877136 = 6669^2 + 14556^2 .

It is not a de Polignac number, because 256352697 - 2¹⁹ = 255828409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256352797) 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, 48922 + ... + 53907.

Almost surely, 2^256352697 is an apocalyptic number.

It is an amenable number.

256352697 is a deficient number, since it is larger than the sum of its proper divisors (115274923).

256352697 is a wasteful number, since it uses less digits than its factorization.

256352697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103112 (or 103109 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 256352697 is about 16011.0179876234. The cubic root of 256352697 is about 635.2518867610.

It can be divided in two parts, 256352 and 697, that added together give a square (257049 = 507²).

The spelling of 256352697 in words is "two hundred fifty-six million, three hundred fifty-two thousand, six hundred ninety-seven".