22515545551 has 8 divisors (see below), whose sum is σ = 23244230144. Its totient is φ = 21787009560.

The previous prime is 22515545519. The next prime is 22515545579. The reversal of 22515545551 is 15554551522.

It is a happy number.

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

It is not a de Polignac number, because 22515545551 - 2⁵ = 22515545519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22515545581) 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, 327856 + ... + 390538.

It is an arithmetic number, because the mean of its divisors is an integer number (2905528768).

Almost surely, 2^22515545551 is an apocalyptic number.

22515545551 is a deficient number, since it is larger than the sum of its proper divisors (728684593).

22515545551 is a wasteful number, since it uses less digits than its factorization.

22515545551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74301.

The product of its digits is 250000, while the sum is 40.

The spelling of 22515545551 in words is "twenty-two billion, five hundred fifteen million, five hundred forty-five thousand, five hundred fifty-one".