225401646 has 16 divisors (see below), whose sum is σ = 451004544. Its totient is φ = 75100344.

The previous prime is 225401639. The next prime is 225401647. The reversal of 225401646 is 646104522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225401647) 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, 8925 + ... + 23031.

It is an arithmetic number, because the mean of its divisors is an integer number (28187784).

Almost surely, 2^225401646 is an apocalyptic number.

225401646 is an abundant number, since it is smaller than the sum of its proper divisors (225602898).

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

225401646 is a wasteful number, since it uses less digits than its factorization.

225401646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16775.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 225401646 is about 15013.3822305302. The cubic root of 225401646 is about 608.5818943641.

The spelling of 225401646 in words is "two hundred twenty-five million, four hundred one thousand, six hundred forty-six".