51315226 has 16 divisors (see below), whose sum is σ = 79484904. Its totient is φ = 24827904.

The previous prime is 51315217. The next prime is 51315227. The reversal of 51315226 is 62251315.

It can be written as a sum of positive squares in 4 ways, for example, as 43758225 + 7557001 = 6615^2 + 2749^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51315226.

It is not an unprimeable number, because it can be changed into a prime (51315227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12486 + ... + 16078.

Almost surely, 2^51315226 is an apocalyptic number.

51315226 is a deficient number, since it is larger than the sum of its proper divisors (28169678).

51315226 is a wasteful number, since it uses less digits than its factorization.

51315226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3825.

The product of its digits is 1800, while the sum is 25.

The square root of 51315226 is about 7163.4646645321. The cubic root of 51315226 is about 371.6054561690.

The spelling of 51315226 in words is "fifty-one million, three hundred fifteen thousand, two hundred twenty-six".