72515253 has 4 divisors (see below), whose sum is σ = 96687008. Its totient is φ = 48343500.

The previous prime is 72515237. The next prime is 72515257. The reversal of 72515253 is 35251527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35251527 = 3 ⋅11750509.

It is not a de Polignac number, because 72515253 - 2⁴ = 72515237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72515253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72515257) 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, 12085873 + ... + 12085878.

It is an arithmetic number, because the mean of its divisors is an integer number (24171752).

Almost surely, 2^72515253 is an apocalyptic number.

It is an amenable number.

72515253 is a deficient number, since it is larger than the sum of its proper divisors (24171755).

72515253 is a wasteful number, since it uses less digits than its factorization.

72515253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24171754.

The product of its digits is 10500, while the sum is 30.

The square root of 72515253 is about 8515.5888228589. The cubic root of 72515253 is about 417.0067858277.

The spelling of 72515253 in words is "seventy-two million, five hundred fifteen thousand, two hundred fifty-three".