222155971 has 2 divisors, whose sum is σ = 222155972. Its totient is φ = 222155970.

The previous prime is 222155959. The next prime is 222156023. The reversal of 222155971 is 179551222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222155971 - 2²⁷ = 87938243 is a prime.

It is not a weakly prime, because it can be changed into another prime (222155911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111077985 + 111077986.

It is an arithmetic number, because the mean of its divisors is an integer number (111077986).

Almost surely, 2^222155971 is an apocalyptic number.

222155971 is a deficient number, since it is larger than the sum of its proper divisors (1).

222155971 is an equidigital number, since it uses as much as digits as its factorization.

222155971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 34.

The square root of 222155971 is about 14904.8975508052. The cubic root of 222155971 is about 605.6466650645.

The spelling of 222155971 in words is "two hundred twenty-two million, one hundred fifty-five thousand, nine hundred seventy-one".