225206920 has 32 divisors (see below), whose sum is σ = 507472920. Its totient is φ = 89948160.

The previous prime is 225206887. The next prime is 225206921. The reversal of 225206920 is 29602522.

It can be written as a sum of positive squares in 4 ways, for example, as 224820036 + 386884 = 14994^2 + 622^2 .

It is not an unprimeable number, because it can be changed into a prime (225206921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25480 + ... + 33160.

Almost surely, 2^225206920 is an apocalyptic number.

225206920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225206920 is an abundant number, since it is smaller than the sum of its proper divisors (282266000).

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

225206920 is a wasteful number, since it uses less digits than its factorization.

225206920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8425 (or 8421 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 225206920 is about 15006.8957482885. The cubic root of 225206920 is about 608.4065912068.

The spelling of 225206920 in words is "two hundred twenty-five million, two hundred six thousand, nine hundred twenty".