451316421 has 8 divisors (see below), whose sum is σ = 668616960. Its totient is φ = 300877596.

The previous prime is 451316413. The next prime is 451316423. The reversal of 451316421 is 124613154.

It is a happy number.

451316421 is a `hidden beast` number, since 4 + 5 + 13 + 1 + 642 + 1 = 666.

It is not a de Polignac number, because 451316421 - 2³ = 451316413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 16715423 = 451316421 / (4 + 5 + 1 + 3 + 1 + 6 + 4 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451316423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8357685 + ... + 8357738.

It is an arithmetic number, because the mean of its divisors is an integer number (83577120).

Almost surely, 2^451316421 is an apocalyptic number.

It is an amenable number.

451316421 is a deficient number, since it is larger than the sum of its proper divisors (217300539).

451316421 is a wasteful number, since it uses less digits than its factorization.

451316421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16715432 (or 16715426 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 451316421 is about 21244.2091168393. The cubic root of 451316421 is about 767.0559536757.

Adding to 451316421 its reverse (124613154), we get a palindrome (575929575).

The spelling of 451316421 in words is "four hundred fifty-one million, three hundred sixteen thousand, four hundred twenty-one".