22585515081 has 4 divisors (see below), whose sum is σ = 30114020112. Its totient is φ = 15057010052.

The previous prime is 22585515077. The next prime is 22585515083. The reversal of 22585515081 is 18051558522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22585515081 - 2² = 22585515077 is a prime.

It is a super-2 number, since 2×22585515081² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22585515083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3764252511 + ... + 3764252516.

It is an arithmetic number, because the mean of its divisors is an integer number (7528505028).

Almost surely, 2^22585515081 is an apocalyptic number.

It is an amenable number.

22585515081 is a deficient number, since it is larger than the sum of its proper divisors (7528505031).

22585515081 is an equidigital number, since it uses as much as digits as its factorization.

22585515081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7528505030.

The product of its (nonzero) digits is 160000, while the sum is 42.

The spelling of 22585515081 in words is "twenty-two billion, five hundred eighty-five million, five hundred fifteen thousand, eighty-one".