51041257 has 2 divisors, whose sum is σ = 51041258. Its totient is φ = 51041256.

The previous prime is 51041231. The next prime is 51041267. The reversal of 51041257 is 75214015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50851161 + 190096 = 7131^2 + 436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51041257 is a prime.

It is a super-2 number, since 2×51041257² = 5210419832280098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51041227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25520628 + 25520629.

It is an arithmetic number, because the mean of its divisors is an integer number (25520629).

Almost surely, 2^51041257 is an apocalyptic number.

It is an amenable number.

51041257 is a deficient number, since it is larger than the sum of its proper divisors (1).

51041257 is an equidigital number, since it uses as much as digits as its factorization.

51041257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 51041257 is about 7144.3164123658. The cubic root of 51041257 is about 370.9429491154.

The spelling of 51041257 in words is "fifty-one million, forty-one thousand, two hundred fifty-seven".