221094889 has 4 divisors (see below), whose sum is σ = 224842320. Its totient is φ = 217347460.

The previous prime is 221094871. The next prime is 221094899. The reversal of 221094889 is 988490122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 988490122 = 2 ⋅494245061.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221094889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221094899) 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, 1873627 + ... + 1873744.

It is an arithmetic number, because the mean of its divisors is an integer number (56210580).

Almost surely, 2^221094889 is an apocalyptic number.

It is an amenable number.

221094889 is a deficient number, since it is larger than the sum of its proper divisors (3747431).

221094889 is an equidigital number, since it uses as much as digits as its factorization.

221094889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3747430.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 221094889 is about 14869.2598672563. The cubic root of 221094889 is about 604.6808771660.

The spelling of 221094889 in words is "two hundred twenty-one million, ninety-four thousand, eight hundred eighty-nine".