72213819 has 4 divisors (see below), whose sum is σ = 96285096. Its totient is φ = 48142544.

The previous prime is 72213811. The next prime is 72213829. The reversal of 72213819 is 91831227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91831227 = 3 ⋅30610409.

It is a cyclic number.

It is not a de Polignac number, because 72213819 - 2³ = 72213811 is a prime.

It is a super-2 number, since 2×72213819² = 10429671309129522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72213819.

It is not an unprimeable number, because it can be changed into a prime (72213811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12035634 + ... + 12035639.

It is an arithmetic number, because the mean of its divisors is an integer number (24071274).

Almost surely, 2^72213819 is an apocalyptic number.

72213819 is a deficient number, since it is larger than the sum of its proper divisors (24071277).

72213819 is a wasteful number, since it uses less digits than its factorization.

72213819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24071276.

The product of its digits is 6048, while the sum is 33.

The square root of 72213819 is about 8497.8714393664. The cubic root of 72213819 is about 416.4281737746.

It can be divided in two parts, 722 and 13819, that added together give a palindrome (14541).

The spelling of 72213819 in words is "seventy-two million, two hundred thirteen thousand, eight hundred nineteen".