451221351231 has 64 divisors (see below), whose sum is σ = 721084446720. Its totient is φ = 245538854400.

The previous prime is 451221351223. The next prime is 451221351241. The reversal of 451221351231 is 132153122154.

It is a happy number.

It is not a de Polignac number, because 451221351231 - 2³ = 451221351223 is a prime.

It is a super-2 number, since 2×451221351231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451221351241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16162921 + ... + 16190813.

It is an arithmetic number, because the mean of its divisors is an integer number (11266944480).

Almost surely, 2^451221351231 is an apocalyptic number.

451221351231 is a deficient number, since it is larger than the sum of its proper divisors (269863095489).

451221351231 is a wasteful number, since it uses less digits than its factorization.

451221351231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28296.

The product of its digits is 7200, while the sum is 30.

Adding to 451221351231 its reverse (132153122154), we get a palindrome (583374473385).

The spelling of 451221351231 in words is "four hundred fifty-one billion, two hundred twenty-one million, three hundred fifty-one thousand, two hundred thirty-one".