51626331 has 12 divisors (see below), whose sum is σ = 78958152. Its totient is φ = 32392896.

The previous prime is 51626321. The next prime is 51626369. The reversal of 51626331 is 13362615.

51626331 is a `hidden beast` number, since 5 + 1 + 626 + 3 + 31 = 666.

51626331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51626331 - 2⁵ = 51626299 is a prime.

It is a super-2 number, since 2×51626331² = 5330556105043122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51626295 and 51626304.

It is not an unprimeable number, because it can be changed into a prime (51626321) 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 in 11 ways as a sum of consecutive naturals, for example, 168561 + ... + 168866.

It is an arithmetic number, because the mean of its divisors is an integer number (6579846).

Almost surely, 2^51626331 is an apocalyptic number.

51626331 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51626331 is a deficient number, since it is larger than the sum of its proper divisors (27331821).

51626331 is a wasteful number, since it uses less digits than its factorization.

51626331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337450 (or 337447 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 51626331 is about 7185.1465538289. The cubic root of 51626331 is about 372.3549118906.

Adding to 51626331 its reverse (13362615), we get a palindrome (64988946).

The spelling of 51626331 in words is "fifty-one million, six hundred twenty-six thousand, three hundred thirty-one".