51515227 has 2 divisors, whose sum is σ = 51515228. Its totient is φ = 51515226.

The previous prime is 51515221. The next prime is 51515249. The reversal of 51515227 is 72251515.

51515227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51515227 - 2²³ = 43126619 is a prime.

It is a super-2 number, since 2×51515227² = 5307637225723058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51515195 and 51515204.

It is not a weakly prime, because it can be changed into another prime (51515221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25757613 + 25757614.

It is an arithmetic number, because the mean of its divisors is an integer number (25757614).

Almost surely, 2^51515227 is an apocalyptic number.

51515227 is a deficient number, since it is larger than the sum of its proper divisors (1).

51515227 is an equidigital number, since it uses as much as digits as its factorization.

51515227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3500, while the sum is 28.

The square root of 51515227 is about 7177.4108841559. The cubic root of 51515227 is about 372.0876075123.

The spelling of 51515227 in words is "fifty-one million, five hundred fifteen thousand, two hundred twenty-seven".