451216851 has 4 divisors (see below), whose sum is σ = 601622472. Its totient is φ = 300811232.

The previous prime is 451216819. The next prime is 451216859. The reversal of 451216851 is 158612154.

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 451216851 - 2⁵ = 451216819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (451216859) 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, 75202806 + ... + 75202811.

It is an arithmetic number, because the mean of its divisors is an integer number (150405618).

Almost surely, 2^451216851 is an apocalyptic number.

451216851 is a deficient number, since it is larger than the sum of its proper divisors (150405621).

451216851 is a wasteful number, since it uses less digits than its factorization.

451216851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150405620.

The product of its digits is 9600, while the sum is 33.

The square root of 451216851 is about 21241.8655254194. The cubic root of 451216851 is about 766.9995399084. Note that the first 3 decimals are identical.

The spelling of 451216851 in words is "four hundred fifty-one million, two hundred sixteen thousand, eight hundred fifty-one".