181485131 has 8 divisors (see below), whose sum is σ = 192144720. Its totient is φ = 170936352.

The previous prime is 181485127. The next prime is 181485179. The reversal of 181485131 is 131584181.

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 181485131 - 2² = 181485127 is a prime.

It is a super-2 number, since 2×181485131² = 65873705548174322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (184485131) 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, 24320 + ... + 30893.

It is an arithmetic number, because the mean of its divisors is an integer number (24018090).

Almost surely, 2^181485131 is an apocalyptic number.

181485131 is a deficient number, since it is larger than the sum of its proper divisors (10659589).

181485131 is a wasteful number, since it uses less digits than its factorization.

181485131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55405.

The product of its digits is 3840, while the sum is 32.

The square root of 181485131 is about 13471.6417336567. The cubic root of 181485131 is about 566.1702125137.

The spelling of 181485131 in words is "one hundred eighty-one million, four hundred eighty-five thousand, one hundred thirty-one".