225250532440 has 128 divisors (see below), whose sum is σ = 548474250240. Its totient is φ = 82930784256.

The previous prime is 225250532411. The next prime is 225250532443. The reversal of 225250532440 is 44235052522.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 225250532396 and 225250532405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225250532443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63502747 + ... + 63506293.

It is an arithmetic number, because the mean of its divisors is an integer number (4284955080).

Almost surely, 2^225250532440 is an apocalyptic number.

225250532440 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 225250532440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274237125120).

225250532440 is an abundant number, since it is smaller than the sum of its proper divisors (323223717800).

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

225250532440 is a wasteful number, since it uses less digits than its factorization.

225250532440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609 (or 5605 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 34.

Adding to 225250532440 its reverse (44235052522), we get a palindrome (269485584962).

The spelling of 225250532440 in words is "two hundred twenty-five billion, two hundred fifty million, five hundred thirty-two thousand, four hundred forty".