431121331 has 2 divisors, whose sum is σ = 431121332. Its totient is φ = 431121330.

The previous prime is 431121323. The next prime is 431121347. The reversal of 431121331 is 133121134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 431121331 - 2³ = 431121323 is a prime.

It is a super-2 number, since 2×431121331² = 371731204086423122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 431121299 and 431121308.

It is not a weakly prime, because it can be changed into another prime (431121731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215560665 + 215560666.

It is an arithmetic number, because the mean of its divisors is an integer number (215560666).

Almost surely, 2^431121331 is an apocalyptic number.

431121331 is a deficient number, since it is larger than the sum of its proper divisors (1).

431121331 is an equidigital number, since it uses as much as digits as its factorization.

431121331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 431121331 is about 20763.4614407136. The cubic root of 431121331 is about 755.4397572590.

Adding to 431121331 its reverse (133121134), we get a palindrome (564242465).

The spelling of 431121331 in words is "four hundred thirty-one million, one hundred twenty-one thousand, three hundred thirty-one".