225511517525 has 48 divisors (see below), whose sum is σ = 330771686400. Its totient is φ = 149227599360.

The previous prime is 225511517521. The next prime is 225511517563. The reversal of 225511517525 is 525715115522.

It is not a de Polignac number, because 225511517525 - 2² = 225511517521 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225511517521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10916156 + ... + 10936794.

It is an arithmetic number, because the mean of its divisors is an integer number (6891076800).

Almost surely, 2^225511517525 is an apocalyptic number.

225511517525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225511517525 is a deficient number, since it is larger than the sum of its proper divisors (105260168875).

225511517525 is a wasteful number, since it uses less digits than its factorization.

225511517525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22838 (or 22833 counting only the distinct ones).

The product of its digits is 175000, while the sum is 41.

The spelling of 225511517525 in words is "two hundred twenty-five billion, five hundred eleven million, five hundred seventeen thousand, five hundred twenty-five".