22543788981 has 8 divisors (see below), whose sum is σ = 34352440384. Its totient is φ = 12882165120.

The previous prime is 22543788973. The next prime is 22543788989. The reversal of 22543788981 is 18988734522.

It is an interprime number because it is at equal distance from previous prime (22543788973) and next prime (22543788989).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22543788981 - 2³ = 22543788973 is a prime.

It is a super-2 number, since 2×22543788981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22543788989) 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, 536756860 + ... + 536756901.

It is an arithmetic number, because the mean of its divisors is an integer number (4294055048).

Almost surely, 2^22543788981 is an apocalyptic number.

22543788981 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22543788981 is a deficient number, since it is larger than the sum of its proper divisors (11808651403).

22543788981 is a wasteful number, since it uses less digits than its factorization.

22543788981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073513771.

The product of its digits is 7741440, while the sum is 57.

The spelling of 22543788981 in words is "twenty-two billion, five hundred forty-three million, seven hundred eighty-eight thousand, nine hundred eighty-one".