72115371 has 6 divisors (see below), whose sum is σ = 104166660. Its totient is φ = 48076908.

The previous prime is 72115333. The next prime is 72115397. The reversal of 72115371 is 17351127.

It is a happy number.

It is not a de Polignac number, because 72115371 - 2¹⁰ = 72114347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72115271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4006401 + ... + 4006418.

It is an arithmetic number, because the mean of its divisors is an integer number (17361110).

Almost surely, 2^72115371 is an apocalyptic number.

72115371 is a deficient number, since it is larger than the sum of its proper divisors (32051289).

72115371 is a wasteful number, since it uses less digits than its factorization.

72115371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8012825 (or 8012822 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 72115371 is about 8492.0769544323. The cubic root of 72115371 is about 416.2388509851.

Adding to 72115371 its reverse (17351127), we get a palindrome (89466498).

The spelling of 72115371 in words is "seventy-two million, one hundred fifteen thousand, three hundred seventy-one".