31231161427 has 2 divisors, whose sum is σ = 31231161428. Its totient is φ = 31231161426.

The previous prime is 31231161419. The next prime is 31231161449. The reversal of 31231161427 is 72416113213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31231161427 - 2³ = 31231161419 is a prime.

It is not a weakly prime, because it can be changed into another prime (31231161407) 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, 15615580713 + 15615580714.

It is an arithmetic number, because the mean of its divisors is an integer number (15615580714).

Almost surely, 2^31231161427 is an apocalyptic number.

31231161427 is a deficient number, since it is larger than the sum of its proper divisors (1).

31231161427 is an equidigital number, since it uses as much as digits as its factorization.

31231161427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The spelling of 31231161427 in words is "thirty-one billion, two hundred thirty-one million, one hundred sixty-one thousand, four hundred twenty-seven".