451221465 has 16 divisors (see below), whose sum is σ = 724425408. Its totient is φ = 239827776.

The previous prime is 451221437. The next prime is 451221499. The reversal of 451221465 is 564122154.

It is not a de Polignac number, because 451221465 - 2²³ = 442832857 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46939 + ... + 55728.

It is an arithmetic number, because the mean of its divisors is an integer number (45276588).

Almost surely, 2^451221465 is an apocalyptic number.

It is an amenable number.

451221465 is a deficient number, since it is larger than the sum of its proper divisors (273203943).

451221465 is a wasteful number, since it uses less digits than its factorization.

451221465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102968.

The product of its digits is 9600, while the sum is 30.

The square root of 451221465 is about 21241.9741314220. The cubic root of 451221465 is about 767.0021542639.

The spelling of 451221465 in words is "four hundred fifty-one million, two hundred twenty-one thousand, four hundred sixty-five".