31130159 has 4 divisors (see below), whose sum is σ = 31141320. Its totient is φ = 31119000.

The previous prime is 31130149. The next prime is 31130161. The reversal of 31130159 is 95103113.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31130159 - 2¹² = 31126063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130149) 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 in 3 ways as a sum of consecutive naturals, for example, 2672 + ... + 8330.

It is an arithmetic number, because the mean of its divisors is an integer number (7785330).

Almost surely, 2^31130159 is an apocalyptic number.

31130159 is a deficient number, since it is larger than the sum of its proper divisors (11161).

31130159 is an equidigital number, since it uses as much as digits as its factorization.

31130159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11160.

The product of its (nonzero) digits is 405, while the sum is 23.

The square root of 31130159 is about 5579.4407425834. The cubic root of 31130159 is about 314.5771061479.

The spelling of 31130159 in words is "thirty-one million, one hundred thirty thousand, one hundred fifty-nine".