22225891998 has 32 divisors (see below), whose sum is σ = 45899707392. Its totient is φ = 7167456000.

The previous prime is 22225891997. The next prime is 22225892011. The reversal of 22225891998 is 89919852222.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22225891997) 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, 661198 + ... + 693998.

It is an arithmetic number, because the mean of its divisors is an integer number (1434365856).

Almost surely, 2^22225891998 is an apocalyptic number.

22225891998 is an abundant number, since it is smaller than the sum of its proper divisors (23673815394).

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

22225891998 is a wasteful number, since it uses less digits than its factorization.

22225891998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36480.

The product of its digits is 3732480, while the sum is 57.

The spelling of 22225891998 in words is "twenty-two billion, two hundred twenty-five million, eight hundred ninety-one thousand, nine hundred ninety-eight".