131631823 has 2 divisors, whose sum is σ = 131631824. Its totient is φ = 131631822.

The previous prime is 131631821. The next prime is 131631847. The reversal of 131631823 is 328136131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131631823 - 2¹ = 131631821 is a prime.

Together with 131631821, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 131631791 and 131631800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131631821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65815911 + 65815912.

It is an arithmetic number, because the mean of its divisors is an integer number (65815912).

Almost surely, 2^131631823 is an apocalyptic number.

131631823 is a deficient number, since it is larger than the sum of its proper divisors (1).

131631823 is an equidigital number, since it uses as much as digits as its factorization.

131631823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 131631823 is about 11473.0912573726. The cubic root of 131631823 is about 508.6905057535.

Adding to 131631823 its reverse (328136131), we get a palindrome (459767954).

The spelling of 131631823 in words is "one hundred thirty-one million, six hundred thirty-one thousand, eight hundred twenty-three".