51631227 has 24 divisors (see below), whose sum is σ = 83126160. Its totient is φ = 30689280.

The previous prime is 51631219. The next prime is 51631231. The reversal of 51631227 is 72213615.

It is a happy number.

51631227 is a `hidden beast` number, since 5 + 1 + 631 + 2 + 27 = 666.

It is not a de Polignac number, because 51631227 - 2³ = 51631219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51631227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51631267) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5974 + ... + 11787.

It is an arithmetic number, because the mean of its divisors is an integer number (3463590).

Almost surely, 2^51631227 is an apocalyptic number.

51631227 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

51631227 is a deficient number, since it is larger than the sum of its proper divisors (31494933).

51631227 is a wasteful number, since it uses less digits than its factorization.

51631227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17803 (or 17800 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 51631227 is about 7185.4872486144. The cubic root of 51631227 is about 372.3666823185.

The spelling of 51631227 in words is "fifty-one million, six hundred thirty-one thousand, two hundred twenty-seven".