256355355 has 16 divisors (see below), whose sum is σ = 428002560. Its totient is φ = 130778208.

The previous prime is 256355347. The next prime is 256355357. The reversal of 256355355 is 553553652.

It is not a de Polignac number, because 256355355 - 2³ = 256355347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256355357) 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, 371185 + ... + 371874.

It is an arithmetic number, because the mean of its divisors is an integer number (26750160).

Almost surely, 2^256355355 is an apocalyptic number.

256355355 is a deficient number, since it is larger than the sum of its proper divisors (171647205).

256355355 is a wasteful number, since it uses less digits than its factorization.

256355355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743090.

The product of its digits is 337500, while the sum is 39.

The square root of 256355355 is about 16011.1009927487. The cubic root of 256355355 is about 635.2540822956.

The spelling of 256355355 in words is "two hundred fifty-six million, three hundred fifty-five thousand, three hundred fifty-five".