22251456136 has 64 divisors (see below), whose sum is σ = 51390662400. Its totient is φ = 8795720448.

The previous prime is 22251456131. The next prime is 22251456137. The reversal of 22251456136 is 63165415222.

It is a junction number, because it is equal to n+sod(n) for n = 22251456095 and 22251456104.

It is not an unprimeable number, because it can be changed into a prime (22251456131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 948646 + ... + 971818.

It is an arithmetic number, because the mean of its divisors is an integer number (802979100).

Almost surely, 2^22251456136 is an apocalyptic number.

22251456136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22251456136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25695331200).

22251456136 is an abundant number, since it is smaller than the sum of its proper divisors (29139206264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22251456136 is a wasteful number, since it uses less digits than its factorization.

22251456136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24518 (or 24514 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The spelling of 22251456136 in words is "twenty-two billion, two hundred fifty-one million, four hundred fifty-six thousand, one hundred thirty-six".