72231619 has 2 divisors, whose sum is σ = 72231620. Its totient is φ = 72231618.

The previous prime is 72231587. The next prime is 72231641. The reversal of 72231619 is 91613227.

It is a strong prime.

It is an emirp because it is prime and its reverse (91613227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72231619 - 2⁵ = 72231587 is a prime.

It is a super-2 number, since 2×72231619² = 10434813566722322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72231689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36115809 + 36115810.

It is an arithmetic number, because the mean of its divisors is an integer number (36115810).

Almost surely, 2^72231619 is an apocalyptic number.

72231619 is a deficient number, since it is larger than the sum of its proper divisors (1).

72231619 is an equidigital number, since it uses as much as digits as its factorization.

72231619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 31.

The square root of 72231619 is about 8498.9186959283. The cubic root of 72231619 is about 416.4623861208.

The spelling of 72231619 in words is "seventy-two million, two hundred thirty-one thousand, six hundred nineteen".