51107257 has 2 divisors, whose sum is σ = 51107258. Its totient is φ = 51107256.

The previous prime is 51107191. The next prime is 51107267. The reversal of 51107257 is 75270115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49406841 + 1700416 = 7029^2 + 1304^2 .

It is a cyclic number.

It is not a de Polignac number, because 51107257 - 2⁷ = 51107129 is a prime.

It is a super-2 number, since 2×51107257² = 5223903436128098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51107267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25553628 + 25553629.

It is an arithmetic number, because the mean of its divisors is an integer number (25553629).

Almost surely, 2^51107257 is an apocalyptic number.

It is an amenable number.

51107257 is a deficient number, since it is larger than the sum of its proper divisors (1).

51107257 is an equidigital number, since it uses as much as digits as its factorization.

51107257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 51107257 is about 7148.9339764751. The cubic root of 51107257 is about 371.1027655151.

The spelling of 51107257 in words is "fifty-one million, one hundred seven thousand, two hundred fifty-seven".