51445651 has 6 divisors (see below), whose sum is σ = 52875060. Its totient is φ = 50053896.

The previous prime is 51445643. The next prime is 51445661. The reversal of 51445651 is 15654415.

It is not a de Polignac number, because 51445651 - 2³ = 51445643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51445601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17421 + ... + 20158.

It is an arithmetic number, because the mean of its divisors is an integer number (8812510).

Almost surely, 2^51445651 is an apocalyptic number.

51445651 is a deficient number, since it is larger than the sum of its proper divisors (1429409).

51445651 is an equidigital number, since it uses as much as digits as its factorization.

51445651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37653 (or 37616 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 51445651 is about 7172.5623733781. The cubic root of 51445651 is about 371.9200193220.

The spelling of 51445651 in words is "fifty-one million, four hundred forty-five thousand, six hundred fifty-one".