51626317 has 2 divisors, whose sum is σ = 51626318. Its totient is φ = 51626316.

The previous prime is 51626299. The next prime is 51626321. The reversal of 51626317 is 71362615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51065316 + 561001 = 7146^2 + 749^2 .

It is a cyclic number.

It is not a de Polignac number, because 51626317 - 2⁷ = 51626189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51626387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25813158 + 25813159.

It is an arithmetic number, because the mean of its divisors is an integer number (25813159).

Almost surely, 2^51626317 is an apocalyptic number.

It is an amenable number.

51626317 is a deficient number, since it is larger than the sum of its proper divisors (1).

51626317 is an equidigital number, since it uses as much as digits as its factorization.

51626317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 31.

The square root of 51626317 is about 7185.1455795968. The cubic root of 51626317 is about 372.3548782322.

The spelling of 51626317 in words is "fifty-one million, six hundred twenty-six thousand, three hundred seventeen".