165502057 has 6 divisors (see below), whose sum is σ = 192522858. Its totient is φ = 141858864.

The previous prime is 165502039. The next prime is 165502061. The reversal of 165502057 is 750205561.

It can be written as a sum of positive squares in only one way, i.e., 160883856 + 4618201 = 12684^2 + 2149^2 .

It is not a de Polignac number, because 165502057 - 2²³ = 157113449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165502037) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1688748 + ... + 1688845.

It is an arithmetic number, because the mean of its divisors is an integer number (32087143).

Almost surely, 2^165502057 is an apocalyptic number.

It is an amenable number.

165502057 is a deficient number, since it is larger than the sum of its proper divisors (27020801).

165502057 is an equidigital number, since it uses as much as digits as its factorization.

165502057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3377607 (or 3377600 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 165502057 is about 12864.7602775955. The cubic root of 165502057 is about 549.0363920698.

The spelling of 165502057 in words is "one hundred sixty-five million, five hundred two thousand, fifty-seven".