72247283 has 4 divisors (see below), whose sum is σ = 72267720. Its totient is φ = 72226848.

The previous prime is 72247261. The next prime is 72247327. The reversal of 72247283 is 38274227.

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 72247283 - 2⁸ = 72247027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72247183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3398 + ... + 12491.

It is an arithmetic number, because the mean of its divisors is an integer number (18066930).

Almost surely, 2^72247283 is an apocalyptic number.

72247283 is a deficient number, since it is larger than the sum of its proper divisors (20437).

72247283 is a wasteful number, since it uses less digits than its factorization.

72247283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20436.

The product of its digits is 37632, while the sum is 35.

The square root of 72247283 is about 8499.8401749680. The cubic root of 72247283 is about 416.4924883365.

The spelling of 72247283 in words is "seventy-two million, two hundred forty-seven thousand, two hundred eighty-three".