225881442 has 24 divisors (see below), whose sum is σ = 498646044. Its totient is φ = 73872864.

The previous prime is 225881419. The next prime is 225881449. The reversal of 225881442 is 244188522.

225881442 is a `hidden beast` number, since 22 + 588 + 14 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 225630441 + 251001 = 15021^2 + 501^2 .

It is a junction number, because it is equal to n+sod(n) for n = 225881397 and 225881406.

It is not an unprimeable number, because it can be changed into a prime (225881449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117433 + ... + 119340.

Almost surely, 2^225881442 is an apocalyptic number.

225881442 is an abundant number, since it is smaller than the sum of its proper divisors (272764602).

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

225881442 is a wasteful number, since it uses less digits than its factorization.

225881442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236834 (or 236831 counting only the distinct ones).

The product of its digits is 40960, while the sum is 36.

The square root of 225881442 is about 15029.3526806712. The cubic root of 225881442 is about 609.0134029260.

The spelling of 225881442 in words is "two hundred twenty-five million, eight hundred eighty-one thousand, four hundred forty-two".