65515057 has 2 divisors, whose sum is σ = 65515058. Its totient is φ = 65515056.

The previous prime is 65515033. The next prime is 65515067. The reversal of 65515057 is 75051556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63297936 + 2217121 = 7956^2 + 1489^2 .

It is a cyclic number.

It is not a de Polignac number, because 65515057 - 2²³ = 57126449 is a prime.

It is not a weakly prime, because it can be changed into another prime (65515067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32757528 + 32757529.

It is an arithmetic number, because the mean of its divisors is an integer number (32757529).

Almost surely, 2^65515057 is an apocalyptic number.

It is an amenable number.

65515057 is a deficient number, since it is larger than the sum of its proper divisors (1).

65515057 is an equidigital number, since it uses as much as digits as its factorization.

65515057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26250, while the sum is 34.

The square root of 65515057 is about 8094.1371992325. The cubic root of 65515057 is about 403.1317845702.

The spelling of 65515057 in words is "sixty-five million, five hundred fifteen thousand, fifty-seven".