16572161 has 8 divisors (see below), whose sum is σ = 18470880. Its totient is φ = 14776128.

The previous prime is 16572139. The next prime is 16572163. The reversal of 16572161 is 16127561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16572161 - 2¹⁸ = 16310017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16572163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25331 + ... + 25976.

It is an arithmetic number, because the mean of its divisors is an integer number (2308860).

Almost surely, 2^16572161 is an apocalyptic number.

It is an amenable number.

16572161 is a deficient number, since it is larger than the sum of its proper divisors (1898719).

16572161 is a wasteful number, since it uses less digits than its factorization.

16572161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51343.

The product of its digits is 2520, while the sum is 29.

The square root of 16572161 is about 4070.8919170128. The cubic root of 16572161 is about 254.9527581329.

The spelling of 16572161 in words is "sixteen million, five hundred seventy-two thousand, one hundred sixty-one".