225144520000 has 70 divisors (see below), whose sum is σ = 558285336818. Its totient is φ = 90057792000.

The previous prime is 225144519997. The next prime is 225144520063. The reversal of 225144520000 is 25441522.

It can be written as a sum of positive squares in 5 ways, for example, as 145746805824 + 79397714176 = 381768^2 + 281776^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2774307 + ... + 2854306.

Almost surely, 2^225144520000 is an apocalyptic number.

225144520000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225144520000 is an abundant number, since it is smaller than the sum of its proper divisors (333140816818).

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

225144520000 is an frugal number, since it uses more digits than its factorization.

225144520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628645 (or 5628620 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 225144520000 its reverse (25441522), we get a palindrome (225169961522).

The spelling of 225144520000 in words is "two hundred twenty-five billion, one hundred forty-four million, five hundred twenty thousand".