22156633551 has 8 divisors (see below), whose sum is σ = 31814653360. Its totient is φ = 13634851392.

The previous prime is 22156633507. The next prime is 22156633553. The reversal of 22156633551 is 15533665122.

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

It is not a de Polignac number, because 22156633551 - 2¹⁵ = 22156600783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 568118809 = 22156633551 / (2 + 2 + 1 + 5 + 6 + 6 + 3 + 3 + 5 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22156633553) 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, 284059366 + ... + 284059443.

It is an arithmetic number, because the mean of its divisors is an integer number (3976831670).

Almost surely, 2^22156633551 is an apocalyptic number.

22156633551 is a deficient number, since it is larger than the sum of its proper divisors (9658019809).

22156633551 is a wasteful number, since it uses less digits than its factorization.

22156633551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568118825.

The product of its digits is 162000, while the sum is 39.

The spelling of 22156633551 in words is "twenty-two billion, one hundred fifty-six million, six hundred thirty-three thousand, five hundred fifty-one".