221947621439115 has 64 divisors (see below), whose sum is σ = 441740588954112. Its totient is φ = 93490071705600.

The previous prime is 221947621439113. The next prime is 221947621439123. The reversal of 221947621439115 is 511934126749122.

It is a happy number.

221947621439115 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221947621439115 - 2¹ = 221947621439113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221947621439113) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3043260141 + ... + 3043333070.

It is an arithmetic number, because the mean of its divisors is an integer number (6902196702408).

Almost surely, 2^{221947621439115} is an apocalyptic number.

221947621439115 is a deficient number, since it is larger than the sum of its proper divisors (219792967514997).

221947621439115 is a wasteful number, since it uses less digits than its factorization.

221947621439115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6086593260.

The product of its digits is 6531840, while the sum is 57.

The spelling of 221947621439115 in words is "two hundred twenty-one trillion, nine hundred forty-seven billion, six hundred twenty-one million, four hundred thirty-nine thousand, one hundred fifteen".