181100022 has 16 divisors (see below), whose sum is σ = 377948160. Its totient is φ = 57741992.

The previous prime is 181100011. The next prime is 181100027. The reversal of 181100022 is 220001181.

It is a junction number, because it is equal to n+sod(n) for n = 181099974 and 181100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181100027) 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, 656022 + ... + 656297.

It is an arithmetic number, because the mean of its divisors is an integer number (23621760).

Almost surely, 2^181100022 is an apocalyptic number.

181100022 is an abundant number, since it is smaller than the sum of its proper divisors (196848138).

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

181100022 is a wasteful number, since it uses less digits than its factorization.

181100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312347.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 181100022 is about 13457.3408220198. The cubic root of 181100022 is about 565.7694603983.

The spelling of 181100022 in words is "one hundred eighty-one million, one hundred thousand, twenty-two".