72207151 has 4 divisors (see below), whose sum is σ = 72224152. Its totient is φ = 72190152.

The previous prime is 72207133. The next prime is 72207169. The reversal of 72207151 is 15170227.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (72207133) and next prime (72207169).

It is a cyclic number.

It is not a de Polignac number, because 72207151 - 2⁵ = 72207119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72207251) 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, 3940 + ... + 12646.

It is an arithmetic number, because the mean of its divisors is an integer number (18056038).

Almost surely, 2^72207151 is an apocalyptic number.

72207151 is a deficient number, since it is larger than the sum of its proper divisors (17001).

72207151 is an equidigital number, since it uses as much as digits as its factorization.

72207151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17000.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 72207151 is about 8497.4790967675. The cubic root of 72207151 is about 416.4153561515.

Adding to 72207151 its reverse (15170227), we get a palindrome (87377378).

The spelling of 72207151 in words is "seventy-two million, two hundred seven thousand, one hundred fifty-one".