225915400 has 24 divisors (see below), whose sum is σ = 525253770. Its totient is φ = 90366080.

The previous prime is 225915367. The next prime is 225915409. The reversal of 225915400 is 4519522.

It can be written as a sum of positive squares in 3 ways, for example, as 137968516 + 87946884 = 11746^2 + 9378^2 .

It is not an unprimeable number, because it can be changed into a prime (225915409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 564589 + ... + 564988.

Almost surely, 2^225915400 is an apocalyptic number.

225915400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225915400 is an abundant number, since it is smaller than the sum of its proper divisors (299338370).

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

225915400 is a wasteful number, since it uses less digits than its factorization.

225915400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129593 (or 1129584 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 225915400 is about 15030.4823608559. The cubic root of 225915400 is about 609.0439201754.

The spelling of 225915400 in words is "two hundred twenty-five million, nine hundred fifteen thousand, four hundred".