72231107272 has 8 divisors (see below), whose sum is σ = 135433326150. Its totient is φ = 36115553632.

The previous prime is 72231107251. The next prime is 72231107329. The reversal of 72231107272 is 27270113227.

It can be written as a sum of positive squares in only one way, i.e., 39965607396 + 32265499876 = 199914^2 + 179626^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4514444197 + ... + 4514444212.

Almost surely, 2^72231107272 is an apocalyptic number.

It is an amenable number.

72231107272 is a deficient number, since it is larger than the sum of its proper divisors (63202218878).

72231107272 is a wasteful number, since it uses less digits than its factorization.

72231107272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9028888415 (or 9028888411 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The spelling of 72231107272 in words is "seventy-two billion, two hundred thirty-one million, one hundred seven thousand, two hundred seventy-two".