431320143 has 16 divisors (see below), whose sum is σ = 607456256. Its totient is φ = 271797120.

The previous prime is 431320139. The next prime is 431320147. The reversal of 431320143 is 341023134.

It is an interprime number because it is at equal distance from previous prime (431320139) and next prime (431320147).

It is not a de Polignac number, because 431320143 - 2² = 431320139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431320147) 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 15 ways as a sum of consecutive naturals, for example, 49930 + ... + 57927.

It is an arithmetic number, because the mean of its divisors is an integer number (37966016).

Almost surely, 2^431320143 is an apocalyptic number.

431320143 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

431320143 is a deficient number, since it is larger than the sum of its proper divisors (176136113).

431320143 is a wasteful number, since it uses less digits than its factorization.

431320143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107934.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 431320143 is about 20768.2484336065. The cubic root of 431320143 is about 755.5558633273. Note that the first 3 decimals are identical.

Adding to 431320143 its reverse (341023134), we get a palindrome (772343277).

The spelling of 431320143 in words is "four hundred thirty-one million, three hundred twenty thousand, one hundred forty-three".