225105145440520 has 32 divisors (see below), whose sum is σ = 536279905315800. Its totient is φ = 84745466518528.

The previous prime is 225105145440457. The next prime is 225105145440569. The reversal of 225105145440520 is 25044541501522.

It can be written as a sum of positive squares in 4 ways, for example, as 210465293086084 + 14639852354436 = 14507422^2 + 3826206^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165518488615 + ... + 165518489974.

Almost surely, 2^{225105145440520} is an apocalyptic number.

225105145440520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225105145440520 is an abundant number, since it is smaller than the sum of its proper divisors (311174759875280).

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

225105145440520 is a wasteful number, since it uses less digits than its factorization.

225105145440520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331036978617 (or 331036978613 counting only the distinct ones).

The product of its (nonzero) digits is 320000, while the sum is 40.

The spelling of 225105145440520 in words is "two hundred twenty-five trillion, one hundred five billion, one hundred forty-five million, four hundred forty thousand, five hundred twenty".