225598001988 has 24 divisors (see below), whose sum is σ = 554100356320. Its totient is φ = 71241474240.

The previous prime is 225598001971. The next prime is 225598001999. The reversal of 225598001988 is 889100895522.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494732233 + ... + 494732688.

Almost surely, 2^225598001988 is an apocalyptic number.

It is an amenable number.

225598001988 is an abundant number, since it is smaller than the sum of its proper divisors (328502354332).

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

225598001988 is a wasteful number, since it uses less digits than its factorization.

225598001988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989464947 (or 989464945 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 57.

The spelling of 225598001988 in words is "two hundred twenty-five billion, five hundred ninety-eight million, one thousand, nine hundred eighty-eight".