451316561 has 18 divisors (see below), whose sum is σ = 491933730. Its totient is φ = 413962240.

The previous prime is 451316549. The next prime is 451316563. The reversal of 451316561 is 165613154.

It can be written as a sum of positive squares in 9 ways, for example, as 313113025 + 138203536 = 17695^2 + 11756^2 .

It is a de Polignac number, because none of the positive numbers 2^k-451316561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451316563) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 485345 + ... + 486273.

Almost surely, 2^451316561 is an apocalyptic number.

451316561 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

451316561 is a deficient number, since it is larger than the sum of its proper divisors (40617169).

451316561 is an equidigital number, since it uses as much as digits as its factorization.

451316561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045 (or 987 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 451316561 is about 21244.2124118547. The cubic root of 451316561 is about 767.0560329902.

The spelling of 451316561 in words is "four hundred fifty-one million, three hundred sixteen thousand, five hundred sixty-one".