72615199 has 4 divisors (see below), whose sum is σ = 72653320. Its totient is φ = 72577080.

The previous prime is 72615187. The next prime is 72615227. The reversal of 72615199 is 99151627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99151627 = 193 ⋅513739.

It is a cyclic number.

It is not a de Polignac number, because 72615199 - 2⁵ = 72615167 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 (72610199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16044 + ... + 20065.

It is an arithmetic number, because the mean of its divisors is an integer number (18163330).

Almost surely, 2^72615199 is an apocalyptic number.

72615199 is a deficient number, since it is larger than the sum of its proper divisors (38121).

72615199 is a wasteful number, since it uses less digits than its factorization.

72615199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38120.

The product of its digits is 34020, while the sum is 40.

The square root of 72615199 is about 8521.4552161001. The cubic root of 72615199 is about 417.1982812954.

The spelling of 72615199 in words is "seventy-two million, six hundred fifteen thousand, one hundred ninety-nine".