72059815 has 4 divisors (see below), whose sum is σ = 86471784. Its totient is φ = 57647848.

The previous prime is 72059803. The next prime is 72059843. The reversal of 72059815 is 51895027.

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 72059815 - 2¹⁷ = 71928743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7205977 + ... + 7205986.

It is an arithmetic number, because the mean of its divisors is an integer number (21617946).

Almost surely, 2^72059815 is an apocalyptic number.

72059815 is a deficient number, since it is larger than the sum of its proper divisors (14411969).

72059815 is a wasteful number, since it uses less digits than its factorization.

72059815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14411968.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 72059815 is about 8488.8052751845. The cubic root of 72059815 is about 416.1319366244.

It can be divided in two parts, 7205 and 9815, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 72059815 in words is "seventy-two million, fifty-nine thousand, eight hundred fifteen".