22144332145 has 32 divisors (see below), whose sum is σ = 29635651584. Its totient is φ = 15774220800.

The previous prime is 22144332139. The next prime is 22144332163. The reversal of 22144332145 is 54123344122.

It is not a de Polignac number, because 22144332145 - 2²⁷ = 22010114417 is a prime.

It is a super-2 number, since 2×22144332145² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 613140 + ... + 648250.

It is an arithmetic number, because the mean of its divisors is an integer number (926114112).

Almost surely, 2^22144332145 is an apocalyptic number.

It is an amenable number.

22144332145 is a deficient number, since it is larger than the sum of its proper divisors (7491319439).

22144332145 is a wasteful number, since it uses less digits than its factorization.

22144332145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35473.

The product of its digits is 23040, while the sum is 31.

Adding to 22144332145 its reverse (54123344122), we get a palindrome (76267676267).

The spelling of 22144332145 in words is "twenty-two billion, one hundred forty-four million, three hundred thirty-two thousand, one hundred forty-five".