221868890183 has 2 divisors, whose sum is σ = 221868890184. Its totient is φ = 221868890182.

The previous prime is 221868890143. The next prime is 221868890207. The reversal of 221868890183 is 381098868122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221868890183 - 2¹² = 221868886087 is a prime.

It is a super-2 number, since 2×221868890183² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221868890123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110934445091 + 110934445092.

It is an arithmetic number, because the mean of its divisors is an integer number (110934445092).

Almost surely, 2^221868890183 is an apocalyptic number.

221868890183 is a deficient number, since it is larger than the sum of its proper divisors (1).

221868890183 is an equidigital number, since it uses as much as digits as its factorization.

221868890183 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2654208, while the sum is 56.

The spelling of 221868890183 in words is "two hundred twenty-one billion, eight hundred sixty-eight million, eight hundred ninety thousand, one hundred eighty-three".