222490605981 has 12 divisors (see below), whose sum is σ = 339036598176. Its totient is φ = 127136253960.

The previous prime is 222490605959. The next prime is 222490606061. The reversal of 222490605981 is 189506094222.

It is not a de Polignac number, because 222490605981 - 2⁵ = 222490605949 is a prime.

It is a super-2 number, since 2×222490605981² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 222490605981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222490605581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2110086 + ... + 2213016.

It is an arithmetic number, because the mean of its divisors is an integer number (28253049848).

Almost surely, 2^222490605981 is an apocalyptic number.

222490605981 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222490605981 is a deficient number, since it is larger than the sum of its proper divisors (116545992195).

222490605981 is an frugal number, since it uses more digits than its factorization.

222490605981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205872 (or 102941 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 222490605981 in words is "two hundred twenty-two billion, four hundred ninety million, six hundred five thousand, nine hundred eighty-one".