72213623 has 8 divisors (see below), whose sum is σ = 76294320. Its totient is φ = 68160960.

The previous prime is 72213599. The next prime is 72213649. The reversal of 72213623 is 32631227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72213623 - 2⁸ = 72213367 is a prime.

It is a super-2 number, since 2×72213623² = 10429614693572258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72213592 and 72213601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72213023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1598 + ... + 12123.

It is an arithmetic number, because the mean of its divisors is an integer number (9536790).

Almost surely, 2^72213623 is an apocalyptic number.

72213623 is a deficient number, since it is larger than the sum of its proper divisors (4080697).

72213623 is a wasteful number, since it uses less digits than its factorization.

72213623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14017.

The product of its digits is 3024, while the sum is 26.

The square root of 72213623 is about 8497.8599070590. The cubic root of 72213623 is about 416.4277970231.

The spelling of 72213623 in words is "seventy-two million, two hundred thirteen thousand, six hundred twenty-three".