181022031 has 12 divisors (see below), whose sum is σ = 270493080. Its totient is φ = 116519760.

The previous prime is 181022021. The next prime is 181022033. The reversal of 181022031 is 130220181.

It is not a de Polignac number, because 181022031 - 2⁵ = 181021999 is a prime.

It is a super-2 number, since 2×181022031² = 65537951414729922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 181021995 and 181022013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181022033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346525 + ... + 347046.

It is an arithmetic number, because the mean of its divisors is an integer number (22541090).

Almost surely, 2^181022031 is an apocalyptic number.

181022031 is a deficient number, since it is larger than the sum of its proper divisors (89471049).

181022031 is a wasteful number, since it uses less digits than its factorization.

181022031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693606 (or 693603 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 181022031 is about 13454.4427978270. The cubic root of 181022031 is about 565.6882322439.

The spelling of 181022031 in words is "one hundred eighty-one million, twenty-two thousand, thirty-one".