221050050520 has 64 divisors (see below), whose sum is σ = 544402031040. Its totient is φ = 80280460800.

The previous prime is 221050050509. The next prime is 221050050523. The reversal of 221050050520 is 25050050122.

It is a junction number, because it is equal to n+sod(n) for n = 221050050491 and 221050050500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221050050523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3452676 + ... + 3516115.

It is an arithmetic number, because the mean of its divisors is an integer number (8506281735).

Almost surely, 2^221050050520 is an apocalyptic number.

221050050520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221050050520 is an abundant number, since it is smaller than the sum of its proper divisors (323351980520).

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

221050050520 is a wasteful number, since it uses less digits than its factorization.

221050050520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6968876 (or 6968872 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The spelling of 221050050520 in words is "two hundred twenty-one billion, fifty million, fifty thousand, five hundred twenty".