256413357 has 14 divisors (see below), whose sum is σ = 384445262. Its totient is φ = 170941752.

The previous prime is 256413337. The next prime is 256413371. The reversal of 256413357 is 753314652.

256413357 is a `hidden beast` number, since 2 + 5 + 641 + 3 + 3 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 152250921 + 104162436 = 12339^2 + 10206^2 .

It is not a de Polignac number, because 256413357 - 2⁷ = 256413229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256413337) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 175138 + ... + 176595.

Almost surely, 2^256413357 is an apocalyptic number.

256413357 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

256413357 is a deficient number, since it is larger than the sum of its proper divisors (128031905).

256413357 is an frugal number, since it uses more digits than its factorization.

256413357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351751 (or 351736 counting only the distinct ones).

The product of its digits is 75600, while the sum is 36.

The square root of 256413357 is about 16012.9121960997. The cubic root of 256413357 is about 635.3019887505.

The spelling of 256413357 in words is "two hundred fifty-six million, four hundred thirteen thousand, three hundred fifty-seven".