222165361723 has 4 divisors (see below), whose sum is σ = 222168888720. Its totient is φ = 222161834728.

The previous prime is 222165361697. The next prime is 222165361729. The reversal of 222165361723 is 327163561222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 222165361723 - 2²¹ = 222163264571 is a prime.

It is a super-2 number, since 2×222165361723² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222165361729) 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, 1667263 + ... + 1795576.

It is an arithmetic number, because the mean of its divisors is an integer number (55542222180).

Almost surely, 2^222165361723 is an apocalyptic number.

222165361723 is a deficient number, since it is larger than the sum of its proper divisors (3526997).

222165361723 is an equidigital number, since it uses as much as digits as its factorization.

222165361723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3526996.

The product of its digits is 181440, while the sum is 40.

The spelling of 222165361723 in words is "two hundred twenty-two billion, one hundred sixty-five million, three hundred sixty-one thousand, seven hundred twenty-three".