18183131 has 8 divisors (see below), whose sum is σ = 18815328. Its totient is φ = 17560000.

The previous prime is 18183107. The next prime is 18183157. The reversal of 18183131 is 13138181.

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

It is a cyclic number.

It is not a de Polignac number, because 18183131 - 2¹⁴ = 18166747 is a prime.

It is a super-2 number, since 2×18183131² = 661252505926322, 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 18183131.

It is not an unprimeable number, because it can be changed into a prime (18183161) 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, 1946 + ... + 6336.

It is an arithmetic number, because the mean of its divisors is an integer number (2351916).

Almost surely, 2^18183131 is an apocalyptic number.

18183131 is a deficient number, since it is larger than the sum of its proper divisors (632197).

18183131 is a wasteful number, since it uses less digits than its factorization.

18183131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4533.

The product of its digits is 576, while the sum is 26.

The square root of 18183131 is about 4264.1682659107. The cubic root of 18183131 is about 262.9599181353.

The spelling of 18183131 in words is "eighteen million, one hundred eighty-three thousand, one hundred thirty-one".