225031320 has 48 divisors (see below), whose sum is σ = 731352960. Its totient is φ = 60008256.

The previous prime is 225031319. The next prime is 225031321. The reversal of 225031320 is 23130522.

225031320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (225031319) and next prime (225031321).

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

It is a junction number, because it is equal to n+sod(n) for n = 225031293 and 225031302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225031321) 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, 312184 + ... + 312903.

It is an arithmetic number, because the mean of its divisors is an integer number (15236520).

Almost surely, 2^225031320 is an apocalyptic number.

225031320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225031320 is an abundant number, since it is smaller than the sum of its proper divisors (506321640).

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

225031320 is a wasteful number, since it uses less digits than its factorization.

225031320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625104 (or 625097 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 225031320 is about 15001.0439636713. The cubic root of 225031320 is about 608.2484196652.

Adding to 225031320 its reverse (23130522), we get a palindrome (248161842).

The spelling of 225031320 in words is "two hundred twenty-five million, thirty-one thousand, three hundred twenty".