225145340 has 48 divisors (see below), whose sum is σ = 542191104. Its totient is φ = 76929600.

The previous prime is 225145313. The next prime is 225145387. The reversal of 225145340 is 43541522.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40955 + ... + 46125.

It is an arithmetic number, because the mean of its divisors is an integer number (11295648).

Almost surely, 2^225145340 is an apocalyptic number.

225145340 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 225145340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271095552).

225145340 is an abundant number, since it is smaller than the sum of its proper divisors (317045764).

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

225145340 is a wasteful number, since it uses less digits than its factorization.

225145340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5498 (or 5496 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 225145340 is about 15004.8438845594. The cubic root of 225145340 is about 608.3511324414.

Adding to 225145340 its reverse (43541522), we get a palindrome (268686862).

The spelling of 225145340 in words is "two hundred twenty-five million, one hundred forty-five thousand, three hundred forty".