165700051 has 16 divisors (see below), whose sum is σ = 186992640. Its totient is φ = 145529280.

The previous prime is 165700033. The next prime is 165700057. The reversal of 165700051 is 150007561.

It is a cyclic number.

It is not a de Polignac number, because 165700051 - 2²¹ = 163602899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165699989 and 165700025.

It is not an unprimeable number, because it can be changed into a prime (165700057) 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 in 15 ways as a sum of consecutive naturals, for example, 38815 + ... + 42871.

It is an arithmetic number, because the mean of its divisors is an integer number (11687040).

Almost surely, 2^165700051 is an apocalyptic number.

165700051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

165700051 is a deficient number, since it is larger than the sum of its proper divisors (21292589).

165700051 is a wasteful number, since it uses less digits than its factorization.

165700051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 165700051 is about 12872.4531849994. The cubic root of 165700051 is about 549.2552465320.

The spelling of 165700051 in words is "one hundred sixty-five million, seven hundred thousand, fifty-one".