72154312 has 16 divisors (see below), whose sum is σ = 141171840. Its totient is φ = 34508496.

The previous prime is 72154309. The next prime is 72154351. The reversal of 72154312 is 21345127.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195888 + ... + 196255.

It is an arithmetic number, because the mean of its divisors is an integer number (8823240).

Almost surely, 2^72154312 is an apocalyptic number.

It is an amenable number.

72154312 is a deficient number, since it is larger than the sum of its proper divisors (69017528).

72154312 is a wasteful number, since it uses less digits than its factorization.

72154312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392172 (or 392168 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 72154312 is about 8494.3694292160. The cubic root of 72154312 is about 416.3137579953.

Adding to 72154312 its reverse (21345127), we get a palindrome (93499439).

The spelling of 72154312 in words is "seventy-two million, one hundred fifty-four thousand, three hundred twelve".