222109427 has 2 divisors, whose sum is σ = 222109428. Its totient is φ = 222109426.

The previous prime is 222109421. The next prime is 222109429. The reversal of 222109427 is 724901222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222109427 is a prime.

Together with 222109429, it forms a pair of twin primes.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 222109427 parts by 21076 straight cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 222109427.

It is not a weakly prime, because it can be changed into another prime (222109421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111054713 + 111054714.

It is an arithmetic number, because the mean of its divisors is an integer number (111054714).

Almost surely, 2^222109427 is an apocalyptic number.

222109427 is a deficient number, since it is larger than the sum of its proper divisors (1).

222109427 is an equidigital number, since it uses as much as digits as its factorization.

222109427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 222109427 is about 14903.3361030341. The cubic root of 222109427 is about 605.6043656729.

The spelling of 222109427 in words is "two hundred twenty-two million, one hundred nine thousand, four hundred twenty-seven".