225431140 has 48 divisors (see below), whose sum is σ = 517466880. Its totient is φ = 81812480.

The previous prime is 225431137. The next prime is 225431147. The reversal of 225431140 is 41134522.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (225431147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203829 + ... + 204931.

It is an arithmetic number, because the mean of its divisors is an integer number (10780560).

Almost surely, 2^225431140 is an apocalyptic number.

225431140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225431140 is an abundant number, since it is smaller than the sum of its proper divisors (292035740).

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

225431140 is a wasteful number, since it uses less digits than its factorization.

225431140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052 (or 2050 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 225431140 is about 15014.3644554140. The cubic root of 225431140 is about 608.6084376952.

Adding to 225431140 its reverse (41134522), we get a palindrome (266565662).

The spelling of 225431140 in words is "two hundred twenty-five million, four hundred thirty-one thousand, one hundred forty".