181130022 has 24 divisors (see below), whose sum is σ = 403056576. Its totient is φ = 58744656.

The previous prime is 181129997. The next prime is 181130051. The reversal of 181130022 is 220031181.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 181129977 and 181130004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135318 + ... + 136649.

It is an arithmetic number, because the mean of its divisors is an integer number (16794024).

Almost surely, 2^181130022 is an apocalyptic number.

181130022 is an abundant number, since it is smaller than the sum of its proper divisors (221926554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181130022 is a wasteful number, since it uses less digits than its factorization.

181130022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272012 (or 272009 counting only the distinct ones).

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

The square root of 181130022 is about 13458.4554091471. The cubic root of 181130022 is about 565.8006993908.

The spelling of 181130022 in words is "one hundred eighty-one million, one hundred thirty thousand, twenty-two".