22147242551 has 24 divisors (see below), whose sum is σ = 26911069920. Its totient is φ = 17833156992.

The previous prime is 22147242511. The next prime is 22147242571. The reversal of 22147242551 is 15524274122.

It is not a de Polignac number, because 22147242551 - 2¹⁰ = 22147241527 is a prime.

It is a super-2 number, since 2×22147242551² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22147242511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238061 + ... + 317753.

It is an arithmetic number, because the mean of its divisors is an integer number (1121294580).

Almost surely, 2^22147242551 is an apocalyptic number.

22147242551 is a deficient number, since it is larger than the sum of its proper divisors (4763827369).

22147242551 is an equidigital number, since it uses as much as digits as its factorization.

22147242551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79803 (or 79766 counting only the distinct ones).

The product of its digits is 44800, while the sum is 35.

The spelling of 22147242551 in words is "twenty-two billion, one hundred forty-seven million, two hundred forty-two thousand, five hundred fifty-one".