222773891 has 4 divisors (see below), whose sum is σ = 226425984. Its totient is φ = 219121800.

The previous prime is 222773867. The next prime is 222773897. The reversal of 222773891 is 198377222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222773891 is a prime.

It is a super-2 number, since 2×222773891² = 99256413022559762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222773897) 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, 1825955 + ... + 1826076.

It is an arithmetic number, because the mean of its divisors is an integer number (56606496).

Almost surely, 2^222773891 is an apocalyptic number.

222773891 is a deficient number, since it is larger than the sum of its proper divisors (3652093).

222773891 is an equidigital number, since it uses as much as digits as its factorization.

222773891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3652092.

The product of its digits is 84672, while the sum is 41.

The square root of 222773891 is about 14925.6119137542. The cubic root of 222773891 is about 606.2076744320.

The spelling of 222773891 in words is "two hundred twenty-two million, seven hundred seventy-three thousand, eight hundred ninety-one".