104431331 has 2 divisors, whose sum is σ = 104431332. Its totient is φ = 104431330.

The previous prime is 104431309. The next prime is 104431333. The reversal of 104431331 is 133134401.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104431331 is a prime.

It is a super-2 number, since 2×104431331² = 21811805788863122, which contains 22 as substring.

Together with 104431333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (104431333) 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, 52215665 + 52215666.

It is an arithmetic number, because the mean of its divisors is an integer number (52215666).

Almost surely, 2^104431331 is an apocalyptic number.

104431331 is a deficient number, since it is larger than the sum of its proper divisors (1).

104431331 is an equidigital number, since it uses as much as digits as its factorization.

104431331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 104431331 is about 10219.1648876021. The cubic root of 104431331 is about 470.9161712985.

Adding to 104431331 its reverse (133134401), we get a palindrome (237565732).

The spelling of 104431331 in words is "one hundred four million, four hundred thirty-one thousand, three hundred thirty-one".