72112331 has 2 divisors, whose sum is σ = 72112332. Its totient is φ = 72112330.

The previous prime is 72112319. The next prime is 72112343. The reversal of 72112331 is 13321127.

It is a balanced prime because it is at equal distance from previous prime (72112319) and next prime (72112343).

It is an emirp because it is prime and its reverse (13321127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72112331 - 2⁶ = 72112267 is a prime.

It is a super-2 number, since 2×72112331² = 10400376564507122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72112361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36056165 + 36056166.

It is an arithmetic number, because the mean of its divisors is an integer number (36056166).

Almost surely, 2^72112331 is an apocalyptic number.

72112331 is a deficient number, since it is larger than the sum of its proper divisors (1).

72112331 is an equidigital number, since it uses as much as digits as its factorization.

72112331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 20.

The square root of 72112331 is about 8491.8979621755. The cubic root of 72112331 is about 416.2330020985.

Adding to 72112331 its reverse (13321127), we get a palindrome (85433458).

The spelling of 72112331 in words is "seventy-two million, one hundred twelve thousand, three hundred thirty-one".