72383531 has 12 divisors (see below), whose sum is σ = 81070416. Its totient is φ = 64555920.

The previous prime is 72383527. The next prime is 72383533. The reversal of 72383531 is 13538327.

It is not a de Polignac number, because 72383531 - 2² = 72383527 is a prime.

It is a super-2 number, since 2×72383531² = 10478751120055922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72383533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 770 + ... + 12056.

It is an arithmetic number, because the mean of its divisors is an integer number (6755868).

Almost surely, 2^72383531 is an apocalyptic number.

72383531 is a deficient number, since it is larger than the sum of its proper divisors (8686885).

72383531 is a wasteful number, since it uses less digits than its factorization.

72383531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11362 (or 11351 counting only the distinct ones).

The product of its digits is 15120, while the sum is 32.

The square root of 72383531 is about 8507.8511388011. The cubic root of 72383531 is about 416.7541389331.

The spelling of 72383531 in words is "seventy-two million, three hundred eighty-three thousand, five hundred thirty-one".