225521037425 has 12 divisors (see below), whose sum is σ = 288666928896. Its totient is φ = 174596931600.

The previous prime is 225521037397. The next prime is 225521037433. The reversal of 225521037425 is 524730125522.

It is not a de Polignac number, because 225521037425 - 2¹⁰ = 225521036401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145496669 + ... + 145498218.

It is an arithmetic number, because the mean of its divisors is an integer number (24055577408).

Almost surely, 2^225521037425 is an apocalyptic number.

225521037425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225521037425 is a deficient number, since it is larger than the sum of its proper divisors (63145891471).

225521037425 is a wasteful number, since it uses less digits than its factorization.

225521037425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290994928 (or 290994923 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 38.

The spelling of 225521037425 in words is "two hundred twenty-five billion, five hundred twenty-one million, thirty-seven thousand, four hundred twenty-five".