225021402 has 48 divisors (see below), whose sum is σ = 508435200. Its totient is φ = 74587392.

The previous prime is 225021359. The next prime is 225021403. The reversal of 225021402 is 204120522.

225021402 is a `hidden beast` number, since 22 + 502 + 140 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225021403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92599 + ... + 94997.

It is an arithmetic number, because the mean of its divisors is an integer number (10592400).

Almost surely, 2^225021402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225021402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254217600).

225021402 is an abundant number, since it is smaller than the sum of its proper divisors (283413798).

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

225021402 is a wasteful number, since it uses less digits than its factorization.

225021402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609 (or 2597 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 225021402 is about 15000.7133830362. The cubic root of 225021402 is about 608.2394835810.

Adding to 225021402 its reverse (204120522), we get a palindrome (429141924).

The spelling of 225021402 in words is "two hundred twenty-five million, twenty-one thousand, four hundred two".