16161572 has 18 divisors (see below), whose sum is σ = 32900742. Its totient is φ = 6926304.

The previous prime is 16161569. The next prime is 16161589. The reversal of 16161572 is 27516161.

It can be written as a sum of positive squares in only one way, i.e., 13147876 + 3013696 = 3626^2 + 1736^2 .

It is a super-2 number, since 2×16161572² = 522392819022368, which contains 22 as substring.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 41033 + ... + 41424.

It is an arithmetic number, because the mean of its divisors is an integer number (1827819).

Almost surely, 2^16161572 is an apocalyptic number.

It is an amenable number.

16161572 is an abundant number, since it is smaller than the sum of its proper divisors (16739170).

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

16161572 is a wasteful number, since it uses less digits than its factorization.

16161572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82475 (or 82466 counting only the distinct ones).

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

The square root of 16161572 is about 4020.1457685014. The cubic root of 16161572 is about 252.8295706276.

The spelling of 16161572 in words is "sixteen million, one hundred sixty-one thousand, five hundred seventy-two".