256153885 has 16 divisors (see below), whose sum is σ = 331478784. Its totient is φ = 188903232.

The previous prime is 256153873. The next prime is 256153903. The reversal of 256153885 is 588351652.

256153885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 256153885 - 2¹¹ = 256151837 is a prime.

It is a super-2 number, since 2×256153885² = 131229625601186450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55164 + ... + 59626.

It is an arithmetic number, because the mean of its divisors is an integer number (20717424).

Almost surely, 2^256153885 is an apocalyptic number.

It is an amenable number.

256153885 is a deficient number, since it is larger than the sum of its proper divisors (75324899).

256153885 is a wasteful number, since it uses less digits than its factorization.

256153885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5364.

The product of its digits is 288000, while the sum is 43.

The square root of 256153885 is about 16004.8081837928. The cubic root of 256153885 is about 635.0876230170.

The spelling of 256153885 in words is "two hundred fifty-six million, one hundred fifty-three thousand, eight hundred eighty-five".