32131043491 has 2 divisors, whose sum is σ = 32131043492. Its totient is φ = 32131043490.

The previous prime is 32131043489. The next prime is 32131043543. The reversal of 32131043491 is 19434013123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 32131043491 - 2¹ = 32131043489 is a prime.

Together with 32131043489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (32131043291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16065521745 + 16065521746.

It is an arithmetic number, because the mean of its divisors is an integer number (16065521746).

Almost surely, 2^32131043491 is an apocalyptic number.

32131043491 is a deficient number, since it is larger than the sum of its proper divisors (1).

32131043491 is an equidigital number, since it uses as much as digits as its factorization.

32131043491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 32131043491 in words is "thirty-two billion, one hundred thirty-one million, forty-three thousand, four hundred ninety-one".