56625421 has 4 divisors (see below), whose sum is σ = 56645244. Its totient is φ = 56605600.

The previous prime is 56625409. The next prime is 56625431. The reversal of 56625421 is 12452665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12452665 = 5 ⋅2490533.

It can be written as a sum of positive squares in 2 ways, for example, as 16112196 + 40513225 = 4014^2 + 6365^2 .

It is a cyclic number.

It is not a de Polignac number, because 56625421 - 2¹¹ = 56623373 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56625431) 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, 4720 + ... + 11641.

It is an arithmetic number, because the mean of its divisors is an integer number (14161311).

Almost surely, 2^56625421 is an apocalyptic number.

It is an amenable number.

56625421 is a deficient number, since it is larger than the sum of its proper divisors (19823).

56625421 is a wasteful number, since it uses less digits than its factorization.

56625421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19822.

The product of its digits is 14400, while the sum is 31.

The square root of 56625421 is about 7524.9864451705. The cubic root of 56625421 is about 384.0052376492.

The spelling of 56625421 in words is "fifty-six million, six hundred twenty-five thousand, four hundred twenty-one".