51331157 has 2 divisors, whose sum is σ = 51331158. Its totient is φ = 51331156.

The previous prime is 51331151. The next prime is 51331169. The reversal of 51331157 is 75113315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27604516 + 23726641 = 5254^2 + 4871^2 .

It is a cyclic number.

It is not a de Polignac number, because 51331157 - 2⁸ = 51330901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51331151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25665578 + 25665579.

It is an arithmetic number, because the mean of its divisors is an integer number (25665579).

Almost surely, 2^51331157 is an apocalyptic number.

It is an amenable number.

51331157 is a deficient number, since it is larger than the sum of its proper divisors (1).

51331157 is an equidigital number, since it uses as much as digits as its factorization.

51331157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1575, while the sum is 26.

The square root of 51331157 is about 7164.5765401732. The cubic root of 51331157 is about 371.6439076154.

The spelling of 51331157 in words is "fifty-one million, three hundred thirty-one thousand, one hundred fifty-seven".