225991488 has 112 divisors (see below), whose sum is σ = 632293376. Its totient is φ = 71124480.

The previous prime is 225991481. The next prime is 225991541. The reversal of 225991488 is 884199522.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225991481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255495 + ... + 256377.

Almost surely, 2^225991488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225991488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316146688).

225991488 is an abundant number, since it is smaller than the sum of its proper divisors (406301888).

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

225991488 is a wasteful number, since it uses less digits than its factorization.

225991488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972 (or 962 counting only the distinct ones).

The product of its digits is 414720, while the sum is 48.

The square root of 225991488 is about 15033.0132707984. The cubic root of 225991488 is about 609.1122875557.

The spelling of 225991488 in words is "two hundred twenty-five million, nine hundred ninety-one thousand, four hundred eighty-eight".