51625861 has 6 divisors (see below), whose sum is σ = 60054630. Its totient is φ = 44250696.

The previous prime is 51625859. The next prime is 51625867. The reversal of 51625861 is 16852615.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 49984900 + 1640961 = 7070^2 + 1281^2 .

It is not a de Polignac number, because 51625861 - 2¹ = 51625859 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 (51625867) 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, 526746 + ... + 526843.

It is an arithmetic number, because the mean of its divisors is an integer number (10009105).

Almost surely, 2^51625861 is an apocalyptic number.

It is an amenable number.

51625861 is a deficient number, since it is larger than the sum of its proper divisors (8428769).

51625861 is a wasteful number, since it uses less digits than its factorization.

51625861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053603 (or 1053596 counting only the distinct ones).

The product of its digits is 14400, while the sum is 34.

The square root of 51625861 is about 7185.1138473931. The cubic root of 51625861 is about 372.3537819288.

The spelling of 51625861 in words is "fifty-one million, six hundred twenty-five thousand, eight hundred sixty-one".