225147840 has 56 divisors (see below), whose sum is σ = 714847440. Its totient is φ = 60039168.

The previous prime is 225147821. The next prime is 225147863. The reversal of 225147840 is 48741522.

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, 116305 + ... + 118224.

Almost surely, 2^225147840 is an apocalyptic number.

225147840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225147840 is an abundant number, since it is smaller than the sum of its proper divisors (489699600).

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

225147840 is a wasteful number, since it uses less digits than its factorization.

225147840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234549 (or 234539 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 225147840 is about 15004.9271907597. The cubic root of 225147840 is about 608.3533841309.

The spelling of 225147840 in words is "two hundred twenty-five million, one hundred forty-seven thousand, eight hundred forty".