225021492 has 18 divisors (see below), whose sum is σ = 568804418. Its totient is φ = 75007152.

The previous prime is 225021431. The next prime is 225021509. The reversal of 225021492 is 294120522.

It is a happy number.

225021492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 186158736 + 38862756 = 13644^2 + 6234^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3125263 + ... + 3125334.

Almost surely, 2^225021492 is an apocalyptic number.

It is an amenable number.

225021492 is an abundant number, since it is smaller than the sum of its proper divisors (343782926).

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

225021492 is a wasteful number, since it uses less digits than its factorization.

225021492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6250607 (or 6250602 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 225021492 is about 15000.7163828932. The cubic root of 225021492 is about 608.2395646719.

The spelling of 225021492 in words is "two hundred twenty-five million, twenty-one thousand, four hundred ninety-two".