51145957 has 2 divisors, whose sum is σ = 51145958. Its totient is φ = 51145956.

The previous prime is 51145949. The next prime is 51145987. The reversal of 51145957 is 75954115.

51145957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47141956 + 4004001 = 6866^2 + 2001^2 .

It is a cyclic number.

It is not a de Polignac number, because 51145957 - 2³ = 51145949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51145987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25572978 + 25572979.

It is an arithmetic number, because the mean of its divisors is an integer number (25572979).

Almost surely, 2^51145957 is an apocalyptic number.

It is an amenable number.

51145957 is a deficient number, since it is larger than the sum of its proper divisors (1).

51145957 is an equidigital number, since it uses as much as digits as its factorization.

51145957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31500, while the sum is 37.

The square root of 51145957 is about 7151.6401615294. The cubic root of 51145957 is about 371.1964120561.

The spelling of 51145957 in words is "fifty-one million, one hundred forty-five thousand, nine hundred fifty-seven".