51246557 has 2 divisors, whose sum is σ = 51246558. Its totient is φ = 51246556.

The previous prime is 51246541. The next prime is 51246563. The reversal of 51246557 is 75564215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38365636 + 12880921 = 6194^2 + 3589^2 .

It is a cyclic number.

It is not a de Polignac number, because 51246557 - 2⁴ = 51246541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51246577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25623278 + 25623279.

It is an arithmetic number, because the mean of its divisors is an integer number (25623279).

Almost surely, 2^51246557 is an apocalyptic number.

It is an amenable number.

51246557 is a deficient number, since it is larger than the sum of its proper divisors (1).

51246557 is an equidigital number, since it uses as much as digits as its factorization.

51246557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42000, while the sum is 35.

The square root of 51246557 is about 7158.6700580485. The cubic root of 51246557 is about 371.4396238681.

The spelling of 51246557 in words is "fifty-one million, two hundred forty-six thousand, five hundred fifty-seven".