231434131 has 2 divisors, whose sum is σ = 231434132. Its totient is φ = 231434130.

The previous prime is 231434113. The next prime is 231434179. The reversal of 231434131 is 131434132.

Together with previous prime (231434113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231434131 - 2¹⁹ = 230909843 is a prime.

It is a super-2 number, since 2×231434131² = 107123513983450322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231431131) 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, 115717065 + 115717066.

It is an arithmetic number, because the mean of its divisors is an integer number (115717066).

Almost surely, 2^231434131 is an apocalyptic number.

231434131 is a deficient number, since it is larger than the sum of its proper divisors (1).

231434131 is an equidigital number, since it uses as much as digits as its factorization.

231434131 is an odious number, because the sum of its binary digits is odd.

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

The square root of 231434131 is about 15212.9593110611. The cubic root of 231434131 is about 613.9633811588.

Adding to 231434131 its reverse (131434132), we get a palindrome (362868263).

Subtracting from 231434131 its reverse (131434132), we obtain a palindrome (99999999).

The spelling of 231434131 in words is "two hundred thirty-one million, four hundred thirty-four thousand, one hundred thirty-one".