72011851 has 2 divisors, whose sum is σ = 72011852. Its totient is φ = 72011850.

The previous prime is 72011839. The next prime is 72011857. The reversal of 72011851 is 15811027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72011851 - 2⁹ = 72011339 is a prime.

It is not a weakly prime, because it can be changed into another prime (72011857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36005925 + 36005926.

It is an arithmetic number, because the mean of its divisors is an integer number (36005926).

Almost surely, 2^72011851 is an apocalyptic number.

72011851 is a deficient number, since it is larger than the sum of its proper divisors (1).

72011851 is an equidigital number, since it uses as much as digits as its factorization.

72011851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 72011851 is about 8485.9796723773. The cubic root of 72011851 is about 416.0395884261.

Adding to 72011851 its reverse (15811027), we get a palindrome (87822878).

The spelling of 72011851 in words is "seventy-two million, eleven thousand, eight hundred fifty-one".