65155117 has 2 divisors, whose sum is σ = 65155118. Its totient is φ = 65155116.

The previous prime is 65155093. The next prime is 65155121. The reversal of 65155117 is 71155156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64545156 + 609961 = 8034^2 + 781^2 .

It is a cyclic number.

It is not a de Polignac number, because 65155117 - 2¹¹ = 65153069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65155127) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32577558 + 32577559.

It is an arithmetic number, because the mean of its divisors is an integer number (32577559).

Almost surely, 2^65155117 is an apocalyptic number.

It is an amenable number.

65155117 is a deficient number, since it is larger than the sum of its proper divisors (1).

65155117 is an equidigital number, since it uses as much as digits as its factorization.

65155117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5250, while the sum is 31.

The square root of 65155117 is about 8071.8719638012. The cubic root of 65155117 is about 402.3921591676.

The spelling of 65155117 in words is "sixty-five million, one hundred fifty-five thousand, one hundred seventeen".