72015191 has 2 divisors, whose sum is σ = 72015192. Its totient is φ = 72015190.

The previous prime is 72015169. The next prime is 72015211. The reversal of 72015191 is 19151027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72015191 - 2²² = 67820887 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72015191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72015131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36007595 + 36007596.

It is an arithmetic number, because the mean of its divisors is an integer number (36007596).

Almost surely, 2^72015191 is an apocalyptic number.

72015191 is a deficient number, since it is larger than the sum of its proper divisors (1).

72015191 is an equidigital number, since it uses as much as digits as its factorization.

72015191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 72015191 is about 8486.1764652875. The cubic root of 72015191 is about 416.0460204727.

The spelling of 72015191 in words is "seventy-two million, fifteen thousand, one hundred ninety-one".