72282247 has 4 divisors (see below), whose sum is σ = 72598120. Its totient is φ = 71966376.

The previous prime is 72282241. The next prime is 72282253. The reversal of 72282247 is 74228227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74228227 = 1063 ⋅69829.

It is an interprime number because it is at equal distance from previous prime (72282241) and next prime (72282253).

It is a cyclic number.

It is not a de Polignac number, because 72282247 - 2¹⁵ = 72249479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72282241) 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, 157593 + ... + 158050.

It is an arithmetic number, because the mean of its divisors is an integer number (18149530).

Almost surely, 2^72282247 is an apocalyptic number.

72282247 is a deficient number, since it is larger than the sum of its proper divisors (315873).

72282247 is a wasteful number, since it uses less digits than its factorization.

72282247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315872.

The product of its digits is 25088, while the sum is 34.

The square root of 72282247 is about 8501.8966707435. The cubic root of 72282247 is about 416.5596645414.

The spelling of 72282247 in words is "seventy-two million, two hundred eighty-two thousand, two hundred forty-seven".