72207371 has 4 divisors (see below), whose sum is σ = 72365832. Its totient is φ = 72048912.

The previous prime is 72207367. The next prime is 72207379. The reversal of 72207371 is 17370227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17370227 = 7 ⋅2481461.

It is a cyclic number.

It is not a de Polignac number, because 72207371 - 2² = 72207367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72207379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78545 + ... + 79458.

It is an arithmetic number, because the mean of its divisors is an integer number (18091458).

Almost surely, 2^72207371 is an apocalyptic number.

72207371 is a deficient number, since it is larger than the sum of its proper divisors (158461).

72207371 is a wasteful number, since it uses less digits than its factorization.

72207371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158460.

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 72207371 is about 8497.4920417733. The cubic root of 72207371 is about 416.4157790611.

Adding to 72207371 its reverse (17370227), we get a palindrome (89577598).

The spelling of 72207371 in words is "seventy-two million, two hundred seven thousand, three hundred seventy-one".