222031081 has 2 divisors, whose sum is σ = 222031082. Its totient is φ = 222031080.

The previous prime is 222031079. The next prime is 222031087. The reversal of 222031081 is 180130222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221563225 + 467856 = 14885^2 + 684^2 .

It is a cyclic number.

It is not a de Polignac number, because 222031081 - 2¹ = 222031079 is a prime.

It is a super-2 number, since 2×222031081² = 98595601860057122, which contains 22 as substring.

Together with 222031079, it forms a pair of twin primes.

It is equal to p_12228211 and since 222031081 and 12228211 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (222031087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111015540 + 111015541.

It is an arithmetic number, because the mean of its divisors is an integer number (111015541).

Almost surely, 2^222031081 is an apocalyptic number.

It is an amenable number.

222031081 is a deficient number, since it is larger than the sum of its proper divisors (1).

222031081 is an equidigital number, since it uses as much as digits as its factorization.

222031081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 222031081 is about 14900.7073993150. The cubic root of 222031081 is about 605.5331511367.

The spelling of 222031081 in words is "two hundred twenty-two million, thirty-one thousand, eighty-one".