221391849056 has 48 divisors (see below), whose sum is σ = 511594697376. Its totient is φ = 92317833216.

The previous prime is 221391849037. The next prime is 221391849101. The reversal of 221391849056 is 650948193122.

It is a super-2 number, since 2×221391849056² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 221391848995 and 221391849013.

It is a congruent number.

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, 13347881 + ... + 13364456.

It is an arithmetic number, because the mean of its divisors is an integer number (10658222862).

Almost surely, 2^221391849056 is an apocalyptic number.

It is an amenable number.

221391849056 is an abundant number, since it is smaller than the sum of its proper divisors (290202848320).

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

221391849056 is a wasteful number, since it uses less digits than its factorization.

221391849056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26712391 (or 26712383 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 221391849056 in words is "two hundred twenty-one billion, three hundred ninety-one million, eight hundred forty-nine thousand, fifty-six".