56420051 has 4 divisors (see below), whose sum is σ = 58365600. Its totient is φ = 54474504.

The previous prime is 56420047. The next prime is 56420057. The reversal of 56420051 is 15002465.

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

It is a cyclic number.

It is not a de Polignac number, because 56420051 - 2² = 56420047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56419999 and 56420026.

It is not an unprimeable number, because it can be changed into a prime (56420057) 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, 972731 + ... + 972788.

It is an arithmetic number, because the mean of its divisors is an integer number (14591400).

Almost surely, 2^56420051 is an apocalyptic number.

56420051 is a deficient number, since it is larger than the sum of its proper divisors (1945549).

56420051 is a wasteful number, since it uses less digits than its factorization.

56420051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945548.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 56420051 is about 7511.3281781586. The cubic root of 56420051 is about 383.5404364606.

The spelling of 56420051 in words is "fifty-six million, four hundred twenty thousand, fifty-one".