634216451 has 16 divisors (see below), whose sum is σ = 704716800. Its totient is φ = 565898400.

The previous prime is 634216441. The next prime is 634216463. The reversal of 634216451 is 154612436.

It is a cyclic number.

It is not a de Polignac number, because 634216451 - 2²² = 630022147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634216441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 495230 + ... + 496508.

It is an arithmetic number, because the mean of its divisors is an integer number (44044800).

Almost surely, 2^634216451 is an apocalyptic number.

634216451 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

634216451 is a deficient number, since it is larger than the sum of its proper divisors (70500349).

634216451 is a wasteful number, since it uses less digits than its factorization.

634216451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090.

The product of its digits is 17280, while the sum is 32.

The square root of 634216451 is about 25183.6544409266. The cubic root of 634216451 is about 859.1701256299.

Adding to 634216451 its reverse (154612436), we get a palindrome (788828887).

The spelling of 634216451 in words is "six hundred thirty-four million, two hundred sixteen thousand, four hundred fifty-one".