56405505 has 32 divisors (see below), whose sum is σ = 97937280. Its totient is φ = 27555840.

The previous prime is 56405497. The next prime is 56405513. The reversal of 56405505 is 50550465.

It is an interprime number because it is at equal distance from previous prime (56405497) and next prime (56405513).

It is not a de Polignac number, because 56405505 - 2³ = 56405497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26065 + ... + 28145.

It is an arithmetic number, because the mean of its divisors is an integer number (3060540).

Almost surely, 2^56405505 is an apocalyptic number.

It is an amenable number.

56405505 is a deficient number, since it is larger than the sum of its proper divisors (41531775).

56405505 is a wasteful number, since it uses less digits than its factorization.

56405505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 56405505 is about 7510.3598449076. The cubic root of 56405505 is about 383.5074726555.

The spelling of 56405505 in words is "fifty-six million, four hundred five thousand, five hundred five".