451221016 has 16 divisors (see below), whose sum is σ = 865715400. Its totient is φ = 220363584.

The previous prime is 451221013. The next prime is 451221079. The reversal of 451221016 is 610122154.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451221013) by changing a digit.

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, 655501 + ... + 656188.

Almost surely, 2^451221016 is an apocalyptic number.

It is an amenable number.

451221016 is a deficient number, since it is larger than the sum of its proper divisors (414494384).

451221016 is a wasteful number, since it uses less digits than its factorization.

451221016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311738 (or 1311734 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 451221016 is about 21241.9635627218. The cubic root of 451221016 is about 767.0018998552.

The spelling of 451221016 in words is "four hundred fifty-one million, two hundred twenty-one thousand, sixteen".