225665115543 has 24 divisors (see below), whose sum is σ = 373852286496. Its totient is φ = 128492582400.

The previous prime is 225665115491. The next prime is 225665115563. The reversal of 225665115543 is 345511566522.

225665115543 is a `hidden beast` number, since 2 + 2 + 56 + 6 + 51 + 1 + 5 + 543 = 666.

It is not a de Polignac number, because 225665115543 - 2¹³ = 225665107351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225665115563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6355938 + ... + 6391343.

It is an arithmetic number, because the mean of its divisors is an integer number (15577178604).

Almost surely, 2^225665115543 is an apocalyptic number.

225665115543 is a deficient number, since it is larger than the sum of its proper divisors (148187170953).

225665115543 is a wasteful number, since it uses less digits than its factorization.

225665115543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12747575 (or 12747572 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 45.

The spelling of 225665115543 in words is "two hundred twenty-five billion, six hundred sixty-five million, one hundred fifteen thousand, five hundred forty-three".