72031211 has 8 divisors (see below), whose sum is σ = 82782720. Its totient is φ = 61395048.

The previous prime is 72031207. The next prime is 72031237. The reversal of 72031211 is 11213027.

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 72031211 - 2² = 72031207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72031211.

It is not an unprimeable number, because it can be changed into a prime (72031241) 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, 27491 + ... + 29996.

It is an arithmetic number, because the mean of its divisors is an integer number (10347840).

Almost surely, 2^72031211 is an apocalyptic number.

72031211 is a deficient number, since it is larger than the sum of its proper divisors (10751509).

72031211 is a wasteful number, since it uses less digits than its factorization.

72031211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57673.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 72031211 is about 8487.1203007852. The cubic root of 72031211 is about 416.0768684230.

Adding to 72031211 its reverse (11213027), we get a palindrome (83244238).

The spelling of 72031211 in words is "seventy-two million, thirty-one thousand, two hundred eleven".