22553987731 has 4 divisors (see below), whose sum is σ = 24604350264. Its totient is φ = 20503625200.

The previous prime is 22553987719. The next prime is 22553987779. The reversal of 22553987731 is 13778935522.

It is a happy number.

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 22553987731 - 2⁹ = 22553987219 is a prime.

It is a super-2 number, since 2×22553987731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22553987711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025181250 + ... + 1025181271.

It is an arithmetic number, because the mean of its divisors is an integer number (6151087566).

Almost surely, 2^22553987731 is an apocalyptic number.

22553987731 is a deficient number, since it is larger than the sum of its proper divisors (2050362533).

22553987731 is a wasteful number, since it uses less digits than its factorization.

22553987731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050362532.

The product of its digits is 3175200, while the sum is 52.

The spelling of 22553987731 in words is "twenty-two billion, five hundred fifty-three million, nine hundred eighty-seven thousand, seven hundred thirty-one".