72221756053 has 2 divisors, whose sum is σ = 72221756054. Its totient is φ = 72221756052.

The previous prime is 72221756051. The next prime is 72221756059. The reversal of 72221756053 is 35065712227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53871802609 + 18349953444 = 232103^2 + 135462^2 .

It is a cyclic number.

It is not a de Polignac number, because 72221756053 - 2¹ = 72221756051 is a prime.

Together with 72221756051, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 72221755997 and 72221756015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72221756051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36110878026 + 36110878027.

It is an arithmetic number, because the mean of its divisors is an integer number (36110878027).

Almost surely, 2^72221756053 is an apocalyptic number.

It is an amenable number.

72221756053 is a deficient number, since it is larger than the sum of its proper divisors (1).

72221756053 is an equidigital number, since it uses as much as digits as its factorization.

72221756053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 72221756053 in words is "seventy-two billion, two hundred twenty-one million, seven hundred fifty-six thousand, fifty-three".