72240529 has 2 divisors, whose sum is σ = 72240530. Its totient is φ = 72240528.

The previous prime is 72240517. The next prime is 72240541. The reversal of 72240529 is 92504227.

It is a balanced prime because it is at equal distance from previous prime (72240517) and next prime (72240541).

It can be written as a sum of positive squares in only one way, i.e., 55100929 + 17139600 = 7423^2 + 4140^2 .

It is an emirp because it is prime and its reverse (92504227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72240529 - 2¹⁵ = 72207761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72240529.

It is not a weakly prime, because it can be changed into another prime (72241529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36120264 + 36120265.

It is an arithmetic number, because the mean of its divisors is an integer number (36120265).

Almost surely, 2^72240529 is an apocalyptic number.

It is an amenable number.

72240529 is a deficient number, since it is larger than the sum of its proper divisors (1).

72240529 is an equidigital number, since it uses as much as digits as its factorization.

72240529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 72240529 is about 8499.4428640941. The cubic root of 72240529 is about 416.4795094035.

The spelling of 72240529 in words is "seventy-two million, two hundred forty thousand, five hundred twenty-nine".