221525044612513 has 32 divisors (see below), whose sum is σ = 225595323832320. Its totient is φ = 217498887002880.

The previous prime is 221525044612453. The next prime is 221525044612549. The reversal of 221525044612513 is 315216440525122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221525044612513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221525044612513.

It is not an unprimeable number, because it can be changed into a prime (221525044672513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12112465273 + ... + 12112483561.

It is an arithmetic number, because the mean of its divisors is an integer number (7049853869760).

Almost surely, 2^{221525044612513} is an apocalyptic number.

It is an amenable number.

221525044612513 is a deficient number, since it is larger than the sum of its proper divisors (4070279219807).

221525044612513 is a wasteful number, since it uses less digits than its factorization.

221525044612513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20269.

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 221525044612513 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, forty-four million, six hundred twelve thousand, five hundred thirteen".