72305851 has 2 divisors, whose sum is σ = 72305852. Its totient is φ = 72305850.

The previous prime is 72305839. The next prime is 72305873. The reversal of 72305851 is 15850327.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72305851 - 2⁵ = 72305819 is a prime.

It is not a weakly prime, because it can be changed into another prime (72305351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36152925 + 36152926.

It is an arithmetic number, because the mean of its divisors is an integer number (36152926).

Almost surely, 2^72305851 is an apocalyptic number.

72305851 is a deficient number, since it is larger than the sum of its proper divisors (1).

72305851 is an equidigital number, since it uses as much as digits as its factorization.

72305851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 72305851 is about 8503.2847182721. The cubic root of 72305851 is about 416.6050025723.

The spelling of 72305851 in words is "seventy-two million, three hundred five thousand, eight hundred fifty-one".