31662132191 has 2 divisors, whose sum is σ = 31662132192. Its totient is φ = 31662132190.

The previous prime is 31662132071. The next prime is 31662132197. The reversal of 31662132191 is 19123126613.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31662132191 is a prime.

It is a super-2 number, since 2×31662132191² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31662132197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15831066095 + 15831066096.

It is an arithmetic number, because the mean of its divisors is an integer number (15831066096).

Almost surely, 2^31662132191 is an apocalyptic number.

31662132191 is a deficient number, since it is larger than the sum of its proper divisors (1).

31662132191 is an equidigital number, since it uses as much as digits as its factorization.

31662132191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 35.

The spelling of 31662132191 in words is "thirty-one billion, six hundred sixty-two million, one hundred thirty-two thousand, one hundred ninety-one".