50513557 has 2 divisors, whose sum is σ = 50513558. Its totient is φ = 50513556.

The previous prime is 50513549. The next prime is 50513597. The reversal of 50513557 is 75531505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28291761 + 22221796 = 5319^2 + 4714^2 .

It is a cyclic number.

It is not a de Polignac number, because 50513557 - 2³ = 50513549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50513527) 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, 25256778 + 25256779.

It is an arithmetic number, because the mean of its divisors is an integer number (25256779).

Almost surely, 2^50513557 is an apocalyptic number.

It is an amenable number.

50513557 is a deficient number, since it is larger than the sum of its proper divisors (1).

50513557 is an equidigital number, since it uses as much as digits as its factorization.

50513557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13125, while the sum is 31.

The square root of 50513557 is about 7107.2890049582. The cubic root of 50513557 is about 369.6601627613.

The spelling of 50513557 in words is "fifty million, five hundred thirteen thousand, five hundred fifty-seven".