72221503 has 2 divisors, whose sum is σ = 72221504. Its totient is φ = 72221502.

The previous prime is 72221497. The next prime is 72221507. The reversal of 72221503 is 30512227.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72221503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72221507) 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, 36110751 + 36110752.

It is an arithmetic number, because the mean of its divisors is an integer number (36110752).

Almost surely, 2^72221503 is an apocalyptic number.

72221503 is a deficient number, since it is larger than the sum of its proper divisors (1).

72221503 is an equidigital number, since it uses as much as digits as its factorization.

72221503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 72221503 is about 8498.3235405579. The cubic root of 72221503 is about 416.4429434343.

The spelling of 72221503 in words is "seventy-two million, two hundred twenty-one thousand, five hundred three".