72317501 has 2 divisors, whose sum is σ = 72317502. Its totient is φ = 72317500.

The previous prime is 72317491. The next prime is 72317521. The reversal of 72317501 is 10571327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39816100 + 32501401 = 6310^2 + 5701^2 .

It is a cyclic number.

It is not a de Polignac number, because 72317501 - 2⁶ = 72317437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72317521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36158750 + 36158751.

It is an arithmetic number, because the mean of its divisors is an integer number (36158751).

Almost surely, 2^72317501 is an apocalyptic number.

It is an amenable number.

72317501 is a deficient number, since it is larger than the sum of its proper divisors (1).

72317501 is an equidigital number, since it uses as much as digits as its factorization.

72317501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 72317501 is about 8503.9697200778. The cubic root of 72317501 is about 416.6273759929.

Adding to 72317501 its reverse (10571327), we get a palindrome (82888828).

The spelling of 72317501 in words is "seventy-two million, three hundred seventeen thousand, five hundred one".