22565221098 has 64 divisors (see below), whose sum is σ = 53269954560. Its totient is φ = 6235891200.

The previous prime is 22565221097. The next prime is 22565221121. The reversal of 22565221098 is 89012256522.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (22565221097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3370138 + ... + 3376826.

It is an arithmetic number, because the mean of its divisors is an integer number (832343040).

Almost surely, 2^22565221098 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22565221098, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26634977280).

22565221098 is an abundant number, since it is smaller than the sum of its proper divisors (30704733462).

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

22565221098 is a wasteful number, since it uses less digits than its factorization.

22565221098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9323.

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 22565221098 in words is "twenty-two billion, five hundred sixty-five million, two hundred twenty-one thousand, ninety-eight".