256280553 has 12 divisors (see below), whose sum is σ = 372123648. Its totient is φ = 169958040.

The previous prime is 256280551. The next prime is 256280567. The reversal of 256280553 is 355082652.

It is a happy number.

256280553 is a `hidden beast` number, since 25 + 6 + 2 + 80 + 553 = 666.

It is not a de Polignac number, because 256280553 - 2¹ = 256280551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256280551) 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, 72825 + ... + 76262.

It is an arithmetic number, because the mean of its divisors is an integer number (31010304).

Almost surely, 2^256280553 is an apocalyptic number.

It is an amenable number.

256280553 is a deficient number, since it is larger than the sum of its proper divisors (115843095).

256280553 is a wasteful number, since it uses less digits than its factorization.

256280553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149284 (or 149281 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 256280553 is about 16008.7648805272. The cubic root of 256280553 is about 635.1922892969.

The spelling of 256280553 in words is "two hundred fifty-six million, two hundred eighty thousand, five hundred fifty-three".