51241657 has 2 divisors, whose sum is σ = 51241658. Its totient is φ = 51241656.

The previous prime is 51241607. The next prime is 51241669. The reversal of 51241657 is 75614215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38489616 + 12752041 = 6204^2 + 3571^2 .

It is a cyclic number.

It is not a de Polignac number, because 51241657 - 2⁷ = 51241529 is a prime.

It is not a weakly prime, because it can be changed into another prime (51241607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25620828 + 25620829.

It is an arithmetic number, because the mean of its divisors is an integer number (25620829).

Almost surely, 2^51241657 is an apocalyptic number.

It is an amenable number.

51241657 is a deficient number, since it is larger than the sum of its proper divisors (1).

51241657 is an equidigital number, since it uses as much as digits as its factorization.

51241657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 31.

The square root of 51241657 is about 7158.3278075260. The cubic root of 51241657 is about 371.4277849448.

The spelling of 51241657 in words is "fifty-one million, two hundred forty-one thousand, six hundred fifty-seven".