56405255 has 4 divisors (see below), whose sum is σ = 67686312. Its totient is φ = 45124200.

The previous prime is 56405249. The next prime is 56405257. The reversal of 56405255 is 55250465.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 56405255 - 2⁶ = 56405191 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 (56405257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5640521 + ... + 5640530.

It is an arithmetic number, because the mean of its divisors is an integer number (16921578).

Almost surely, 2^56405255 is an apocalyptic number.

56405255 is a deficient number, since it is larger than the sum of its proper divisors (11281057).

56405255 is a wasteful number, since it uses less digits than its factorization.

56405255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11281056.

The product of its (nonzero) digits is 30000, while the sum is 32.

The square root of 56405255 is about 7510.3432012126. The cubic root of 56405255 is about 383.5069060618.

The spelling of 56405255 in words is "fifty-six million, four hundred five thousand, two hundred fifty-five".