72215255591 has 2 divisors, whose sum is σ = 72215255592. Its totient is φ = 72215255590.

The previous prime is 72215255573. The next prime is 72215255633. The reversal of 72215255591 is 19555251227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72215255591 - 2³⁰ = 71141513767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72215255551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36107627795 + 36107627796.

It is an arithmetic number, because the mean of its divisors is an integer number (36107627796).

Almost surely, 2^72215255591 is an apocalyptic number.

72215255591 is a deficient number, since it is larger than the sum of its proper divisors (1).

72215255591 is an equidigital number, since it uses as much as digits as its factorization.

72215255591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 315000, while the sum is 44.

The spelling of 72215255591 in words is "seventy-two billion, two hundred fifteen million, two hundred fifty-five thousand, five hundred ninety-one".