225649140 has 24 divisors (see below), whose sum is σ = 631817760. Its totient is φ = 60173088.

The previous prime is 225649139. The next prime is 225649153. The reversal of 225649140 is 41946522.

It is a congruent number.

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, 1880350 + ... + 1880469.

It is an arithmetic number, because the mean of its divisors is an integer number (26325740).

Almost surely, 2^225649140 is an apocalyptic number.

225649140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225649140 is an abundant number, since it is smaller than the sum of its proper divisors (406168620).

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

225649140 is a wasteful number, since it uses less digits than its factorization.

225649140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3760831 (or 3760829 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 225649140 is about 15021.6224157046. The cubic root of 225649140 is about 608.8045565554.

The spelling of 225649140 in words is "two hundred twenty-five million, six hundred forty-nine thousand, one hundred forty".