222250091 has 4 divisors (see below), whose sum is σ = 254000112. Its totient is φ = 190500072.

The previous prime is 222250069. The next prime is 222250097. The reversal of 222250091 is 190052222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190052222 = 2 ⋅95026111.

It is not a de Polignac number, because 222250091 - 2¹⁰ = 222249067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222250097) 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, 15875000 + ... + 15875013.

It is an arithmetic number, because the mean of its divisors is an integer number (63500028).

Almost surely, 2^222250091 is an apocalyptic number.

222250091 is a deficient number, since it is larger than the sum of its proper divisors (31750021).

222250091 is an equidigital number, since it uses as much as digits as its factorization.

222250091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31750020.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 222250091 is about 14908.0545679173. The cubic root of 222250091 is about 605.7321836840.

The spelling of 222250091 in words is "two hundred twenty-two million, two hundred fifty thousand, ninety-one".