225315420 has 96 divisors (see below), whose sum is σ = 690633216. Its totient is φ = 54432000.

The previous prime is 225315407. The next prime is 225315437. The reversal of 225315420 is 24513522.

225315420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321070 + ... + 321770.

It is an arithmetic number, because the mean of its divisors is an integer number (7194096).

Almost surely, 2^225315420 is an apocalyptic number.

225315420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225315420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345316608).

225315420 is an abundant number, since it is smaller than the sum of its proper divisors (465317796).

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

225315420 is a wasteful number, since it uses less digits than its factorization.

225315420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211 (or 1209 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 225315420 is about 15010.5103177740. The cubic root of 225315420 is about 608.5042813916.

Adding to 225315420 its reverse (24513522), we get a palindrome (249828942).

The spelling of 225315420 in words is "two hundred twenty-five million, three hundred fifteen thousand, four hundred twenty".