72224293 has 2 divisors, whose sum is σ = 72224294. Its totient is φ = 72224292.

The previous prime is 72224291. The next prime is 72224303. The reversal of 72224293 is 39242227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62694724 + 9529569 = 7918^2 + 3087^2 .

It is a cyclic number.

It is not a de Polignac number, because 72224293 - 2¹ = 72224291 is a prime.

Together with 72224291, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72224291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36112146 + 36112147.

It is an arithmetic number, because the mean of its divisors is an integer number (36112147).

Almost surely, 2^72224293 is an apocalyptic number.

It is an amenable number.

72224293 is a deficient number, since it is larger than the sum of its proper divisors (1).

72224293 is an equidigital number, since it uses as much as digits as its factorization.

72224293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

The square root of 72224293 is about 8498.4876889950. The cubic root of 72224293 is about 416.4483059224.

The spelling of 72224293 in words is "seventy-two million, two hundred twenty-four thousand, two hundred ninety-three".