165145722 has 32 divisors (see below), whose sum is σ = 379392000. Its totient is φ = 46945008.

The previous prime is 165145709. The next prime is 165145723. The reversal of 165145722 is 227541561.

It is not an unprimeable number, because it can be changed into a prime (165145723) 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, 1522 + ... + 18237.

It is an arithmetic number, because the mean of its divisors is an integer number (11856000).

Almost surely, 2^165145722 is an apocalyptic number.

165145722 is an abundant number, since it is smaller than the sum of its proper divisors (214246278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165145722 is a wasteful number, since it uses less digits than its factorization.

165145722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19970.

The product of its digits is 16800, while the sum is 33.

The square root of 165145722 is about 12850.9035480000. The cubic root of 165145722 is about 548.6420737896.

The spelling of 165145722 in words is "one hundred sixty-five million, one hundred forty-five thousand, seven hundred twenty-two".