72221507887 has 2 divisors, whose sum is σ = 72221507888. Its totient is φ = 72221507886.

The previous prime is 72221507843. The next prime is 72221507959. The reversal of 72221507887 is 78870512227.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72221507887 - 2⁷ = 72221507759 is a prime.

It is a super-3 number, since 3×72221507887³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72221507887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72221507387) 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, 36110753943 + 36110753944.

It is an arithmetic number, because the mean of its divisors is an integer number (36110753944).

Almost surely, 2^72221507887 is an apocalyptic number.

72221507887 is a deficient number, since it is larger than the sum of its proper divisors (1).

72221507887 is an equidigital number, since it uses as much as digits as its factorization.

72221507887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 878080, while the sum is 49.

The spelling of 72221507887 in words is "seventy-two billion, two hundred twenty-one million, five hundred seven thousand, eight hundred eighty-seven".