72213434591 has 2 divisors, whose sum is σ = 72213434592. Its totient is φ = 72213434590.

The previous prime is 72213434551. The next prime is 72213434597. The reversal of 72213434591 is 19543431227.

It is a strong prime.

It is an emirp because it is prime and its reverse (19543431227) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72213434591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72213434597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36106717295 + 36106717296.

It is an arithmetic number, because the mean of its divisors is an integer number (36106717296).

Almost surely, 2^72213434591 is an apocalyptic number.

72213434591 is a deficient number, since it is larger than the sum of its proper divisors (1).

72213434591 is an equidigital number, since it uses as much as digits as its factorization.

72213434591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The spelling of 72213434591 in words is "seventy-two billion, two hundred thirteen million, four hundred thirty-four thousand, five hundred ninety-one".