1565165053 has 2 divisors, whose sum is σ = 1565165054. Its totient is φ = 1565165052.

The previous prime is 1565164999. The next prime is 1565165057. The reversal of 1565165053 is 3505615651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 991179289 + 573985764 = 31483^2 + 23958^2 .

It is a cyclic number.

It is not a de Polignac number, because 1565165053 - 2²¹ = 1563067901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1565165057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782582526 + 782582527.

It is an arithmetic number, because the mean of its divisors is an integer number (782582527).

Almost surely, 2^1565165053 is an apocalyptic number.

It is an amenable number.

1565165053 is a deficient number, since it is larger than the sum of its proper divisors (1).

1565165053 is an equidigital number, since it uses as much as digits as its factorization.

1565165053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67500, while the sum is 37.

The square root of 1565165053 is about 39562.1669401462. The cubic root of 1565165053 is about 1161.0565712810.

The spelling of 1565165053 in words is "one billion, five hundred sixty-five million, one hundred sixty-five thousand, fifty-three".