72531086 has 4 divisors (see below), whose sum is σ = 108796632. Its totient is φ = 36265542.

The previous prime is 72531079. The next prime is 72531101. The reversal of 72531086 is 68013527.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68013527 = 71 ⋅957937.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 18132770 + ... + 18132773.

It is an arithmetic number, because the mean of its divisors is an integer number (27199158).

Almost surely, 2^72531086 is an apocalyptic number.

72531086 is a deficient number, since it is larger than the sum of its proper divisors (36265546).

72531086 is a wasteful number, since it uses less digits than its factorization.

72531086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36265545.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 72531086 is about 8516.5184201057. The cubic root of 72531086 is about 417.0371334107.

The spelling of 72531086 in words is "seventy-two million, five hundred thirty-one thousand, eighty-six".