51626431 has 2 divisors, whose sum is σ = 51626432. Its totient is φ = 51626430.

The previous prime is 51626387. The next prime is 51626437. The reversal of 51626431 is 13462615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51626431 - 2¹⁷ = 51495359 is a prime.

It is a super-2 number, since 2×51626431² = 5330576755595522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51626431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51626437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25813215 + 25813216.

It is an arithmetic number, because the mean of its divisors is an integer number (25813216).

Almost surely, 2^51626431 is an apocalyptic number.

51626431 is a deficient number, since it is larger than the sum of its proper divisors (1).

51626431 is an equidigital number, since it uses as much as digits as its factorization.

51626431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 51626431 is about 7185.1535126259. The cubic root of 51626431 is about 372.3551523071.

The spelling of 51626431 in words is "fifty-one million, six hundred twenty-six thousand, four hundred thirty-one".