72518871 has 4 divisors (see below), whose sum is σ = 96691832. Its totient is φ = 48345912.

The previous prime is 72518869. The next prime is 72518881. The reversal of 72518871 is 17881527.

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

It is not a de Polignac number, because 72518871 - 2¹ = 72518869 is a prime.

It is a super-2 number, since 2×72518871² = 10517973302229282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72518861) 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, 12086476 + ... + 12086481.

It is an arithmetic number, because the mean of its divisors is an integer number (24172958).

Almost surely, 2^72518871 is an apocalyptic number.

72518871 is a deficient number, since it is larger than the sum of its proper divisors (24172961).

72518871 is a wasteful number, since it uses less digits than its factorization.

72518871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24172960.

The product of its digits is 31360, while the sum is 39.

The square root of 72518871 is about 8515.8012541393. The cubic root of 72518871 is about 417.0137209455.

The spelling of 72518871 in words is "seventy-two million, five hundred eighteen thousand, eight hundred seventy-one".