451331431 has 2 divisors, whose sum is σ = 451331432. Its totient is φ = 451331430.

The previous prime is 451331423. The next prime is 451331467. The reversal of 451331431 is 134133154.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 451331431 - 2³ = 451331423 is a prime.

It is a super-2 number, since 2×451331431² = 407400121217015522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 451331396 and 451331405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451331401) 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 as a sum of consecutive naturals, namely, 225665715 + 225665716.

It is an arithmetic number, because the mean of its divisors is an integer number (225665716).

Almost surely, 2^451331431 is an apocalyptic number.

451331431 is a deficient number, since it is larger than the sum of its proper divisors (1).

451331431 is an equidigital number, since it uses as much as digits as its factorization.

451331431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 25.

The square root of 451331431 is about 21244.5623866438. The cubic root of 451331431 is about 767.0644572309.

Adding to 451331431 its reverse (134133154), we get a palindrome (585464585).

It can be divided in two parts, 45133 and 1431, that added together give a palindrome (46564).

The spelling of 451331431 in words is "four hundred fifty-one million, three hundred thirty-one thousand, four hundred thirty-one".