225289620 has 48 divisors (see below), whose sum is σ = 700902720. Its totient is φ = 60077088.

The previous prime is 225289619. The next prime is 225289637. The reversal of 225289620 is 26982522.

225289620 is a `hidden beast` number, since 2 + 2 + 5 + 28 + 9 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208062 + ... + 209141.

It is an arithmetic number, because the mean of its divisors is an integer number (14602140).

Almost surely, 2^225289620 is an apocalyptic number.

225289620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225289620 is an abundant number, since it is smaller than the sum of its proper divisors (475613100).

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

225289620 is a wasteful number, since it uses less digits than its factorization.

225289620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417221 (or 417213 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 225289620 is about 15009.6508953406. The cubic root of 225289620 is about 608.4810546787.

The spelling of 225289620 in words is "two hundred twenty-five million, two hundred eighty-nine thousand, six hundred twenty".