16223131 has 16 divisors (see below), whose sum is σ = 17948160. Its totient is φ = 14605920.

The previous prime is 16223111. The next prime is 16223149. The reversal of 16223131 is 13132261.

It is a cyclic number.

It is not a de Polignac number, because 16223131 - 2⁵ = 16223099 is a prime.

It is a super-2 number, since 2×16223131² = 526379958886322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 16223099 and 16223108.

It is not an unprimeable number, because it can be changed into a prime (16223101) 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, 32796 + ... + 33286.

It is an arithmetic number, because the mean of its divisors is an integer number (1121760).

Almost surely, 2^16223131 is an apocalyptic number.

16223131 is a deficient number, since it is larger than the sum of its proper divisors (1725029).

16223131 is a wasteful number, since it uses less digits than its factorization.

16223131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594.

The product of its digits is 216, while the sum is 19.

The square root of 16223131 is about 4027.7948060943. The cubic root of 16223131 is about 253.1501709664.

Adding to 16223131 its reverse (13132261), we get a palindrome (29355392).

It can be divided in two parts, 1622 and 3131, that added together give a triangular number (4753 = T₉₇).

The spelling of 16223131 in words is "sixteen million, two hundred twenty-three thousand, one hundred thirty-one".