221525560025312 has 48 divisors (see below), whose sum is σ = 445213806055200. Its totient is φ = 108471245437440.

The previous prime is 221525560025303. The next prime is 221525560025317. The reversal of 221525560025312 is 213520065525122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221525560025312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221525560025317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247340012 + ... + 248234027.

It is an arithmetic number, because the mean of its divisors is an integer number (9275287626150).

Almost surely, 2^{221525560025312} is an apocalyptic number.

It is an amenable number.

221525560025312 is an abundant number, since it is smaller than the sum of its proper divisors (223688246029888).

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

221525560025312 is a wasteful number, since it uses less digits than its factorization.

221525560025312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495574339 (or 495574331 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 221525560025312 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, five hundred sixty million, twenty-five thousand, three hundred twelve".