72315302 has 4 divisors (see below), whose sum is σ = 108472956. Its totient is φ = 36157650.

The previous prime is 72315283. The next prime is 72315307. The reversal of 72315302 is 20351327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20351327 = 151 ⋅134777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72315307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18078824 + ... + 18078827.

It is an arithmetic number, because the mean of its divisors is an integer number (27118239).

Almost surely, 2^72315302 is an apocalyptic number.

72315302 is a deficient number, since it is larger than the sum of its proper divisors (36157654).

72315302 is a wasteful number, since it uses less digits than its factorization.

72315302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36157653.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 72315302 is about 8503.8404265367. The cubic root of 72315302 is about 416.6231530737.

Adding to 72315302 its reverse (20351327), we get a palindrome (92666629).

The spelling of 72315302 in words is "seventy-two million, three hundred fifteen thousand, three hundred two".