221615002050 has 96 divisors (see below), whose sum is σ = 607879551552. Its totient is φ = 53077006080.

The previous prime is 221615002039. The next prime is 221615002057. The reversal of 221615002050 is 50200516122.

It is a happy number.

It is a super-2 number, since 2×221615002050² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221615002050.

It is not an unprimeable number, because it can be changed into a prime (221615002057) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1463644 + ... + 1607943.

It is an arithmetic number, because the mean of its divisors is an integer number (6332078662).

Almost surely, 2^221615002050 is an apocalyptic number.

221615002050 is an abundant number, since it is smaller than the sum of its proper divisors (386264549502).

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

221615002050 is a wasteful number, since it uses less digits than its factorization.

221615002050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071652 (or 3071647 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 221615002050 its reverse (50200516122), we get a palindrome (271815518172).

The spelling of 221615002050 in words is "two hundred twenty-one billion, six hundred fifteen million, two thousand, fifty".