16572131 has 4 divisors (see below), whose sum is σ = 16636872. Its totient is φ = 16507392.

The previous prime is 16572119. The next prime is 16572139. The reversal of 16572131 is 13127561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13127561 = 883 ⋅14867.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16572131 is a prime.

It is a super-2 number, since 2×16572131² = 549271051762322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16572131.

It is not an unprimeable number, because it can be changed into a prime (16572139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31985 + ... + 32498.

It is an arithmetic number, because the mean of its divisors is an integer number (4159218).

Almost surely, 2^16572131 is an apocalyptic number.

16572131 is a deficient number, since it is larger than the sum of its proper divisors (64741).

16572131 is an equidigital number, since it uses as much as digits as its factorization.

16572131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64740.

The product of its digits is 1260, while the sum is 26.

The square root of 16572131 is about 4070.8882323149. Note that the first 3 decimals coincide. The cubic root of 16572131 is about 254.9526042888.

Adding to 16572131 its reverse (13127561), we get a palindrome (29699692).

The spelling of 16572131 in words is "sixteen million, five hundred seventy-two thousand, one hundred thirty-one".