72253015 has 4 divisors (see below), whose sum is σ = 86703624. Its totient is φ = 57802408.

The previous prime is 72253003. The next prime is 72253019. The reversal of 72253015 is 51035227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51035227 = 179 ⋅285113.

It is a cyclic number.

It is not a de Polignac number, because 72253015 - 2¹¹ = 72250967 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 (72253019) 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, 7225297 + ... + 7225306.

It is an arithmetic number, because the mean of its divisors is an integer number (21675906).

Almost surely, 2^72253015 is an apocalyptic number.

72253015 is a deficient number, since it is larger than the sum of its proper divisors (14450609).

72253015 is a wasteful number, since it uses less digits than its factorization.

72253015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14450608.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 72253015 is about 8500.1773510910. The cubic root of 72253015 is about 416.5035026922.

The spelling of 72253015 in words is "seventy-two million, two hundred fifty-three thousand, fifteen".