53615557 has 2 divisors, whose sum is σ = 53615558. Its totient is φ = 53615556.

The previous prime is 53615543. The next prime is 53615561. The reversal of 53615557 is 75551635.

53615557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53450721 + 164836 = 7311^2 + 406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53615557 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 (53615567) 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, 26807778 + 26807779.

It is an arithmetic number, because the mean of its divisors is an integer number (26807779).

Almost surely, 2^53615557 is an apocalyptic number.

It is an amenable number.

53615557 is a deficient number, since it is larger than the sum of its proper divisors (1).

53615557 is an equidigital number, since it uses as much as digits as its factorization.

53615557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78750, while the sum is 37.

The square root of 53615557 is about 7322.2644721425. The cubic root of 53615557 is about 377.0772004280.

The spelling of 53615557 in words is "fifty-three million, six hundred fifteen thousand, five hundred fifty-seven".