72222863 has 2 divisors, whose sum is σ = 72222864. Its totient is φ = 72222862.

The previous prime is 72222823. The next prime is 72222881. The reversal of 72222863 is 36822227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72222863 - 2¹² = 72218767 is a prime.

It is a super-2 number, since 2×72222863² = 10432283879833538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72222823) 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, 36111431 + 36111432.

It is an arithmetic number, because the mean of its divisors is an integer number (36111432).

Almost surely, 2^72222863 is an apocalyptic number.

72222863 is a deficient number, since it is larger than the sum of its proper divisors (1).

72222863 is an equidigital number, since it uses as much as digits as its factorization.

72222863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 32.

The square root of 72222863 is about 8498.4035559627. The cubic root of 72222863 is about 416.4455574242.

The spelling of 72222863 in words is "seventy-two million, two hundred twenty-two thousand, eight hundred sixty-three".