72222142857 has 4 divisors (see below), whose sum is σ = 96296190480. Its totient is φ = 48148095236.

The previous prime is 72222142843. The next prime is 72222142913. The reversal of 72222142857 is 75824122227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72222142857 - 2²² = 72217948553 is a prime.

It is a super-2 number, since 2×72222142857² (a number of 23 digits) contains 22 as substring.

72222142857 is a modest number, since divided by 142857 gives 72222 as remainder.

It is not an unprimeable number, because it can be changed into a prime (72222142357) 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, 12037023807 + ... + 12037023812.

It is an arithmetic number, because the mean of its divisors is an integer number (24074047620).

Almost surely, 2^72222142857 is an apocalyptic number.

It is an amenable number.

72222142857 is a deficient number, since it is larger than the sum of its proper divisors (24074047623).

72222142857 is a wasteful number, since it uses less digits than its factorization.

72222142857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24074047622.

The product of its digits is 250880, while the sum is 42.

The spelling of 72222142857 in words is "seventy-two billion, two hundred twenty-two million, one hundred forty-two thousand, eight hundred fifty-seven".