165542915 has 16 divisors (see below), whose sum is σ = 209748000. Its totient is φ = 125079552.

The previous prime is 165542911. The next prime is 165542929. The reversal of 165542915 is 519245561.

It is a cyclic number.

It is not a de Polignac number, because 165542915 - 2² = 165542911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165542911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30659 + ... + 35651.

It is an arithmetic number, because the mean of its divisors is an integer number (13109250).

Almost surely, 2^165542915 is an apocalyptic number.

165542915 is a deficient number, since it is larger than the sum of its proper divisors (44205085).

165542915 is a wasteful number, since it uses less digits than its factorization.

165542915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5366.

The product of its digits is 54000, while the sum is 38.

The square root of 165542915 is about 12866.3481609974. The cubic root of 165542915 is about 549.0815691179.

The spelling of 165542915 in words is "one hundred sixty-five million, five hundred forty-two thousand, nine hundred fifteen".