181133131 has 8 divisors (see below), whose sum is σ = 183803904. Its totient is φ = 178480680.

The previous prime is 181133129. The next prime is 181133149. The reversal of 181133131 is 131331181.

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 181133131 - 2¹ = 181133129 is a prime.

It is a super-2 number, since 2×181133131² = 65618422291726322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181133231) 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, 16006 + ... + 24868.

It is an arithmetic number, because the mean of its divisors is an integer number (22975488).

Almost surely, 2^181133131 is an apocalyptic number.

181133131 is a deficient number, since it is larger than the sum of its proper divisors (2670773).

181133131 is a wasteful number, since it uses less digits than its factorization.

181133131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9161.

The product of its digits is 216, while the sum is 22.

The square root of 181133131 is about 13458.5709122477. The cubic root of 181133131 is about 565.8039365945.

The spelling of 181133131 in words is "one hundred eighty-one million, one hundred thirty-three thousand, one hundred thirty-one".