225207740 has 24 divisors (see below), whose sum is σ = 479600352. Its totient is φ = 88813760.

The previous prime is 225207739. The next prime is 225207769. The reversal of 225207740 is 47702522.

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, 77879 + ... + 80718.

It is an arithmetic number, because the mean of its divisors is an integer number (19983348).

Almost surely, 2^225207740 is an apocalyptic number.

225207740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225207740 is an abundant number, since it is smaller than the sum of its proper divisors (254392612).

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

225207740 is a wasteful number, since it uses less digits than its factorization.

225207740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158677 (or 158675 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 225207740 is about 15006.9230690372. The cubic root of 225207740 is about 608.4073296282.

The spelling of 225207740 in words is "two hundred twenty-five million, two hundred seven thousand, seven hundred forty".