16653131 has 4 divisors (see below), whose sum is σ = 18167064. Its totient is φ = 15139200.

The previous prime is 16653103. The next prime is 16653137. The reversal of 16653131 is 13135661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16653131 - 2⁶ = 16653067 is a prime.

It is a super-2 number, since 2×16653131² = 554653544206322, 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 16653131.

It is not an unprimeable number, because it can be changed into a prime (16653137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756950 + ... + 756971.

It is an arithmetic number, because the mean of its divisors is an integer number (4541766).

Almost surely, 2^16653131 is an apocalyptic number.

16653131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16653131 is a deficient number, since it is larger than the sum of its proper divisors (1513933).

16653131 is a wasteful number, since it uses less digits than its factorization.

16653131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513932.

The product of its digits is 1620, while the sum is 26.

The square root of 16653131 is about 4080.8247940827. The cubic root of 16653131 is about 255.3673086760.

Adding to 16653131 its reverse (13135661), we get a palindrome (29788792).

The spelling of 16653131 in words is "sixteen million, six hundred fifty-three thousand, one hundred thirty-one".