51907117 has 2 divisors, whose sum is σ = 51907118. Its totient is φ = 51907116.

The previous prime is 51907109. The next prime is 51907127. The reversal of 51907117 is 71170915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43903876 + 8003241 = 6626^2 + 2829^2 .

It is a cyclic number.

It is not a de Polignac number, because 51907117 - 2³ = 51907109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51907127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25953558 + 25953559.

It is an arithmetic number, because the mean of its divisors is an integer number (25953559).

Almost surely, 2^51907117 is an apocalyptic number.

It is an amenable number.

51907117 is a deficient number, since it is larger than the sum of its proper divisors (1).

51907117 is an equidigital number, since it uses as much as digits as its factorization.

51907117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2205, while the sum is 31.

The square root of 51907117 is about 7204.6593951415. The cubic root of 51907117 is about 373.0287480807.

The spelling of 51907117 in words is "fifty-one million, nine hundred seven thousand, one hundred seventeen".