51626421 has 96 divisors (see below), whose sum is σ = 100638720. Its totient is φ = 24710400.

The previous prime is 51626387. The next prime is 51626431. The reversal of 51626421 is 12462615.

51626421 is a `hidden beast` number, since 5 + 16 + 2 + 642 + 1 = 666.

51626421 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 51626421 - 2¹⁴ = 51610037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51626431) 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 95 ways as a sum of consecutive naturals, for example, 653460 + ... + 653538.

It is an arithmetic number, because the mean of its divisors is an integer number (1048320).

Almost surely, 2^51626421 is an apocalyptic number.

It is an amenable number.

51626421 is a deficient number, since it is larger than the sum of its proper divisors (49012299).

51626421 is a wasteful number, since it uses less digits than its factorization.

51626421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 164 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 51626421 is about 7185.1528167465. The cubic root of 51626421 is about 372.3551282655.

The spelling of 51626421 in words is "fifty-one million, six hundred twenty-six thousand, four hundred twenty-one".