51313225 has 12 divisors (see below), whose sum is σ = 67371804. Its totient is φ = 38635520.

The previous prime is 51313219. The next prime is 51313231. The reversal of 51313225 is 52231315.

It is an interprime number because it is at equal distance from previous prime (51313219) and next prime (51313231).

It can be written as a sum of positive squares in 6 ways, for example, as 3316041 + 47997184 = 1821^2 + 6928^2 .

It is not a de Polignac number, because 51313225 - 2⁵ = 51313193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51313196 and 51313205.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59944 + ... + 60793.

It is an arithmetic number, because the mean of its divisors is an integer number (5614317).

Almost surely, 2^51313225 is an apocalyptic number.

It is an amenable number.

51313225 is a deficient number, since it is larger than the sum of its proper divisors (16058579).

51313225 is a wasteful number, since it uses less digits than its factorization.

51313225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120764 (or 120759 counting only the distinct ones).

The product of its digits is 900, while the sum is 22.

The square root of 51313225 is about 7163.3249961174. The cubic root of 51313225 is about 371.6006259445.

The spelling of 51313225 in words is "fifty-one million, three hundred thirteen thousand, two hundred twenty-five".