51626939 has 12 divisors (see below), whose sum is σ = 64676304. Its totient is φ = 40847184.

The previous prime is 51626903. The next prime is 51626941. The reversal of 51626939 is 93962615.

It is not a de Polignac number, because 51626939 - 2²⁴ = 34849723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51626896 and 51626905.

It is not an unprimeable number, because it can be changed into a prime (51626039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39887 + ... + 41160.

It is an arithmetic number, because the mean of its divisors is an integer number (5389692).

Almost surely, 2^51626939 is an apocalyptic number.

51626939 is a deficient number, since it is larger than the sum of its proper divisors (13049365).

51626939 is a wasteful number, since it uses less digits than its factorization.

51626939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81074 (or 81067 counting only the distinct ones).

The product of its digits is 87480, while the sum is 41.

The square root of 51626939 is about 7185.1888632102. The cubic root of 51626939 is about 372.3563736182.

The spelling of 51626939 in words is "fifty-one million, six hundred twenty-six thousand, nine hundred thirty-nine".