221563190639 has 4 divisors (see below), whose sum is σ = 253215075024. Its totient is φ = 189911306256.

The previous prime is 221563190593. The next prime is 221563190687. The reversal of 221563190639 is 936091365122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936091365122 = 2 ⋅468045682561.

It is not a de Polignac number, because 221563190639 - 2³⁶ = 152843713903 is a prime.

It is a super-2 number, since 2×221563190639² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221563190593 and 221563190602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221563190039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15825942182 + ... + 15825942195.

It is an arithmetic number, because the mean of its divisors is an integer number (63303768756).

Almost surely, 2^221563190639 is an apocalyptic number.

221563190639 is a deficient number, since it is larger than the sum of its proper divisors (31651884385).

221563190639 is an equidigital number, since it uses as much as digits as its factorization.

221563190639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31651884384.

The product of its (nonzero) digits is 524880, while the sum is 47.

The spelling of 221563190639 in words is "two hundred twenty-one billion, five hundred sixty-three million, one hundred ninety thousand, six hundred thirty-nine".