72247503 has 4 divisors (see below), whose sum is σ = 96330008. Its totient is φ = 48165000.

The previous prime is 72247499. The next prime is 72247543. The reversal of 72247503 is 30574227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30574227 = 3 ⋅10191409.

It is not a de Polignac number, because 72247503 - 2² = 72247499 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 (72247543) 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, 12041248 + ... + 12041253.

It is an arithmetic number, because the mean of its divisors is an integer number (24082502).

Almost surely, 2^72247503 is an apocalyptic number.

72247503 is a deficient number, since it is larger than the sum of its proper divisors (24082505).

72247503 is a wasteful number, since it uses less digits than its factorization.

72247503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24082504.

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 72247503 is about 8499.8531163780. The cubic root of 72247503 is about 416.4929110894.

The spelling of 72247503 in words is "seventy-two million, two hundred forty-seven thousand, five hundred three".