72218575 has 24 divisors (see below), whose sum is σ = 105212016. Its totient is φ = 48480000.

The previous prime is 72218569. The next prime is 72218579. The reversal of 72218575 is 57581227.

It is not a de Polignac number, because 72218575 - 2¹⁷ = 72087503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72218579) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6526 + ... + 13675.

It is an arithmetic number, because the mean of its divisors is an integer number (4383834).

Almost surely, 2^72218575 is an apocalyptic number.

72218575 is a deficient number, since it is larger than the sum of its proper divisors (32993441).

72218575 is a wasteful number, since it uses less digits than its factorization.

72218575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20235 (or 20230 counting only the distinct ones).

The product of its digits is 39200, while the sum is 37.

The square root of 72218575 is about 8498.1512695409. The cubic root of 72218575 is about 416.4373155563.

The spelling of 72218575 in words is "seventy-two million, two hundred eighteen thousand, five hundred seventy-five".