72815411 has 4 divisors (see below), whose sum is σ = 72973824. Its totient is φ = 72657000.

The previous prime is 72815389. The next prime is 72815417. The reversal of 72815411 is 11451827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72815411 - 2¹⁰ = 72814387 is a prime.

It is a super-3 number, since 3×72815411³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72815417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78515 + ... + 79436.

It is an arithmetic number, because the mean of its divisors is an integer number (18243456).

Almost surely, 2^72815411 is an apocalyptic number.

72815411 is a deficient number, since it is larger than the sum of its proper divisors (158413).

72815411 is a wasteful number, since it uses less digits than its factorization.

72815411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158412.

The product of its digits is 2240, while the sum is 29.

The square root of 72815411 is about 8533.1946538210. The cubic root of 72815411 is about 417.5813574463.

The spelling of 72815411 in words is "seventy-two million, eight hundred fifteen thousand, four hundred eleven".