451720454231 has 4 divisors (see below), whose sum is σ = 475495215000. Its totient is φ = 427945693464.

The previous prime is 451720454197. The next prime is 451720454357. The reversal of 451720454231 is 132454027154.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-451720454231 is a prime.

It is a super-2 number, since 2×451720454231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451720454431) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11887380356 + ... + 11887380393.

It is an arithmetic number, because the mean of its divisors is an integer number (118873803750).

Almost surely, 2^451720454231 is an apocalyptic number.

451720454231 is a deficient number, since it is larger than the sum of its proper divisors (23774760769).

451720454231 is a wasteful number, since it uses less digits than its factorization.

451720454231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23774760768.

The product of its (nonzero) digits is 134400, while the sum is 38.

The spelling of 451720454231 in words is "four hundred fifty-one billion, seven hundred twenty million, four hundred fifty-four thousand, two hundred thirty-one".