83231431 has 2 divisors, whose sum is σ = 83231432. Its totient is φ = 83231430.

The previous prime is 83231429. The next prime is 83231437. The reversal of 83231431 is 13413238.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83231431 - 2¹ = 83231429 is a prime.

It is a super-2 number, since 2×83231431² = 13854942212615522, which contains 22 as substring.

Together with 83231429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 83231396 and 83231405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83231437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41615715 + 41615716.

It is an arithmetic number, because the mean of its divisors is an integer number (41615716).

Almost surely, 2^83231431 is an apocalyptic number.

83231431 is a deficient number, since it is larger than the sum of its proper divisors (1).

83231431 is an equidigital number, since it uses as much as digits as its factorization.

83231431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 83231431 is about 9123.1261637665. The cubic root of 83231431 is about 436.6121199727.

Adding to 83231431 its reverse (13413238), we get a palindrome (96644669).

The spelling of 83231431 in words is "eighty-three million, two hundred thirty-one thousand, four hundred thirty-one".