165572051 has 4 divisors (see below), whose sum is σ = 165653400. Its totient is φ = 165490704.

The previous prime is 165572021. The next prime is 165572081. The reversal of 165572051 is 150275561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150275561 = 349 ⋅430589.

It is an interprime number because it is at equal distance from previous prime (165572021) and next prime (165572081).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165572051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165571999 and 165572017.

It is not an unprimeable number, because it can be changed into a prime (165572021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37541 + ... + 41718.

It is an arithmetic number, because the mean of its divisors is an integer number (41413350).

Almost surely, 2^165572051 is an apocalyptic number.

165572051 is a deficient number, since it is larger than the sum of its proper divisors (81349).

165572051 is an equidigital number, since it uses as much as digits as its factorization.

165572051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81348.

The product of its (nonzero) digits is 10500, while the sum is 32.

The square root of 165572051 is about 12867.4803671892. The cubic root of 165572051 is about 549.1137805078.

The spelling of 165572051 in words is "one hundred sixty-five million, five hundred seventy-two thousand, fifty-one".