72147651 has 4 divisors (see below), whose sum is σ = 96196872. Its totient is φ = 48098432.

The previous prime is 72147641. The next prime is 72147671. The reversal of 72147651 is 15674127.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72147651 - 2⁶ = 72147587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72147611) 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, 12024606 + ... + 12024611.

It is an arithmetic number, because the mean of its divisors is an integer number (24049218).

Almost surely, 2^72147651 is an apocalyptic number.

72147651 is a deficient number, since it is larger than the sum of its proper divisors (24049221).

72147651 is a wasteful number, since it uses less digits than its factorization.

72147651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24049220.

The product of its digits is 11760, while the sum is 33.

The square root of 72147651 is about 8493.9773369135. The cubic root of 72147651 is about 416.3009467892.

The spelling of 72147651 in words is "seventy-two million, one hundred forty-seven thousand, six hundred fifty-one".