131431423 has 2 divisors, whose sum is σ = 131431424. Its totient is φ = 131431422.

The previous prime is 131431397. The next prime is 131431439. The reversal of 131431423 is 324134131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131431423 - 2⁹ = 131430911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131431394 and 131431403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131431123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65715711 + 65715712.

It is an arithmetic number, because the mean of its divisors is an integer number (65715712).

Almost surely, 2^131431423 is an apocalyptic number.

131431423 is a deficient number, since it is larger than the sum of its proper divisors (1).

131431423 is an equidigital number, since it uses as much as digits as its factorization.

131431423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 131431423 is about 11464.3544519524. The cubic root of 131431423 is about 508.4322263807.

Adding to 131431423 its reverse (324134131), we get a palindrome (455565554).

The spelling of 131431423 in words is "one hundred thirty-one million, four hundred thirty-one thousand, four hundred twenty-three".