222791081 has 4 divisors (see below), whose sum is σ = 222862464. Its totient is φ = 222719700.

The previous prime is 222791077. The next prime is 222791083. The reversal of 222791081 is 180197222.

It is a happy number.

222791081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 180197222 = 2 ⋅90098611.

It is a cyclic number.

It is not a de Polignac number, because 222791081 - 2² = 222791077 is a prime.

It is a super-2 number, since 2×222791081² = 99271731546297122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222791083) 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, 30785 + ... + 37326.

It is an arithmetic number, because the mean of its divisors is an integer number (55715616).

Almost surely, 2^222791081 is an apocalyptic number.

It is an amenable number.

222791081 is a deficient number, since it is larger than the sum of its proper divisors (71383).

222791081 is an equidigital number, since it uses as much as digits as its factorization.

222791081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71382.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 222791081 is about 14926.1877584332. The cubic root of 222791081 is about 606.2232663877.

The spelling of 222791081 in words is "two hundred twenty-two million, seven hundred ninety-one thousand, eighty-one".