22165531123 has 4 divisors (see below), whose sum is σ = 22880548288. Its totient is φ = 21450513960.

The previous prime is 22165531121. The next prime is 22165531153. The reversal of 22165531123 is 32113556122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22165531123 - 2¹ = 22165531121 is a prime.

It is a super-2 number, since 2×22165531123² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 715017133 = 22165531123 / (2 + 2 + 1 + 6 + 5 + 5 + 3 + 1 + 1 + 2 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22165531121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357508536 + ... + 357508597.

It is an arithmetic number, because the mean of its divisors is an integer number (5720137072).

Almost surely, 2^22165531123 is an apocalyptic number.

22165531123 is a deficient number, since it is larger than the sum of its proper divisors (715017165).

22165531123 is an equidigital number, since it uses as much as digits as its factorization.

22165531123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715017164.

The product of its digits is 10800, while the sum is 31.

The spelling of 22165531123 in words is "twenty-two billion, one hundred sixty-five million, five hundred thirty-one thousand, one hundred twenty-three".