72351572 has 12 divisors (see below), whose sum is σ = 129004596. Its totient is φ = 35493120.

The previous prime is 72351557. The next prime is 72351577. The reversal of 72351572 is 27515327.

It can be written as a sum of positive squares in 2 ways, for example, as 65869456 + 6482116 = 8116^2 + 2546^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72351577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170429 + ... + 170852.

It is an arithmetic number, because the mean of its divisors is an integer number (10750383).

Almost surely, 2^72351572 is an apocalyptic number.

It is an amenable number.

72351572 is a deficient number, since it is larger than the sum of its proper divisors (56653024).

72351572 is a wasteful number, since it uses less digits than its factorization.

72351572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341338 (or 341336 counting only the distinct ones).

The product of its digits is 14700, while the sum is 32.

The square root of 72351572 is about 8505.9727250915. The cubic root of 72351572 is about 416.6927943794.

Adding to 72351572 its reverse (27515327), we get a palindrome (99866899).

The spelling of 72351572 in words is "seventy-two million, three hundred fifty-one thousand, five hundred seventy-two".