72217623 has 16 divisors (see below), whose sum is σ = 97653600. Its totient is φ = 47468160.

The previous prime is 72217619. The next prime is 72217633. The reversal of 72217623 is 32671227.

It is not a de Polignac number, because 72217623 - 2² = 72217619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72217633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87553 + ... + 88373.

It is an arithmetic number, because the mean of its divisors is an integer number (6103350).

Almost surely, 2^72217623 is an apocalyptic number.

72217623 is a deficient number, since it is larger than the sum of its proper divisors (25435977).

72217623 is a wasteful number, since it uses less digits than its factorization.

72217623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202.

The product of its digits is 7056, while the sum is 30.

The square root of 72217623 is about 8498.0952571738. The cubic root of 72217623 is about 416.4354856944.

The spelling of 72217623 in words is "seventy-two million, two hundred seventeen thousand, six hundred twenty-three".