221500501264 has 40 divisors (see below), whose sum is σ = 501871578560. Its totient is φ = 92721138048.

The previous prime is 221500501259. The next prime is 221500501283. The reversal of 221500501264 is 462105005122.

221500501264 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22991499 + ... + 23001130.

It is an arithmetic number, because the mean of its divisors is an integer number (12546789464).

Almost surely, 2^221500501264 is an apocalyptic number.

It is an amenable number.

221500501264 is an abundant number, since it is smaller than the sum of its proper divisors (280371077296).

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

221500501264 is a wasteful number, since it uses less digits than its factorization.

221500501264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45992687 (or 45992681 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 221500501264 its reverse (462105005122), we get a palindrome (683605506386).

The spelling of 221500501264 in words is "two hundred twenty-one billion, five hundred million, five hundred one thousand, two hundred sixty-four".