72231213 has 8 divisors (see below), whose sum is σ = 96582528. Its totient is φ = 48017024.

The previous prime is 72231197. The next prime is 72231221. The reversal of 72231213 is 31213227.

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 72231213 - 2⁴ = 72231197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72231213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72231223) 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, 33045 + ... + 35162.

It is an arithmetic number, because the mean of its divisors is an integer number (12072816).

Almost surely, 2^72231213 is an apocalyptic number.

It is an amenable number.

72231213 is a deficient number, since it is larger than the sum of its proper divisors (24351315).

72231213 is a wasteful number, since it uses less digits than its factorization.

72231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68563.

The product of its digits is 504, while the sum is 21.

The square root of 72231213 is about 8498.8948105033. The cubic root of 72231213 is about 416.4616058345.

The spelling of 72231213 in words is "seventy-two million, two hundred thirty-one thousand, two hundred thirteen".