451313505 has 32 divisors (see below), whose sum is σ = 819417600. Its totient is φ = 235575936.

The previous prime is 451313459. The next prime is 451313507. The reversal of 451313505 is 505313154.

It is not a de Polignac number, because 451313505 - 2⁷ = 451313377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (451313507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29220 + ... + 41909.

It is an arithmetic number, because the mean of its divisors is an integer number (25606800).

Almost surely, 2^451313505 is an apocalyptic number.

451313505 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

451313505 is a deficient number, since it is larger than the sum of its proper divisors (368104095).

451313505 is a wasteful number, since it uses less digits than its factorization.

451313505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71190 (or 71184 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 451313505 is about 21244.1404862611. The cubic root of 451313505 is about 767.0543016641.

Adding to 451313505 its reverse (505313154), we get a palindrome (956626659).

The spelling of 451313505 in words is "four hundred fifty-one million, three hundred thirteen thousand, five hundred five".