72222865723 has 4 divisors (see below), whose sum is σ = 72234947088. Its totient is φ = 72210784360.

The previous prime is 72222865711. The next prime is 72222865727. The reversal of 72222865723 is 32756822227.

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 72222865723 - 2¹⁷ = 72222734651 is a prime.

It is a super-2 number, since 2×72222865723² (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 (72222865727) 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, 6031711 + ... + 6043672.

It is an arithmetic number, because the mean of its divisors is an integer number (18058736772).

Almost surely, 2^72222865723 is an apocalyptic number.

72222865723 is a deficient number, since it is larger than the sum of its proper divisors (12081365).

72222865723 is a wasteful number, since it uses less digits than its factorization.

72222865723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12081364.

The product of its digits is 1128960, while the sum is 46.

The spelling of 72222865723 in words is "seventy-two billion, two hundred twenty-two million, eight hundred sixty-five thousand, seven hundred twenty-three".