56281553 has 16 divisors (see below), whose sum is σ = 60782400. Its totient is φ = 51955200.

The previous prime is 56281549. The next prime is 56281567. The reversal of 56281553 is 35518265.

It is a cyclic number.

It is not a de Polignac number, because 56281553 - 2² = 56281549 is a prime.

It is a super-2 number, since 2×56281553² = 6335226416183618, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56281583) 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, 140153 + ... + 140553.

It is an arithmetic number, because the mean of its divisors is an integer number (3798900).

Almost surely, 2^56281553 is an apocalyptic number.

It is an amenable number.

56281553 is a deficient number, since it is larger than the sum of its proper divisors (4500847).

56281553 is a wasteful number, since it uses less digits than its factorization.

56281553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592.

The product of its digits is 36000, while the sum is 35.

The square root of 56281553 is about 7502.1032384259. The cubic root of 56281553 is about 383.2263453578.

The spelling of 56281553 in words is "fifty-six million, two hundred eighty-one thousand, five hundred fifty-three".