31142086 has 16 divisors (see below), whose sum is σ = 48769200. Its totient is φ = 14899680.

The previous prime is 31142077. The next prime is 31142087. The reversal of 31142086 is 68024113.

It is a self number, because there is not a number n which added to its sum of digits gives 31142086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31142087) 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 7 ways as a sum of consecutive naturals, for example, 1065 + ... + 7963.

It is an arithmetic number, because the mean of its divisors is an integer number (3048075).

Almost surely, 2^31142086 is an apocalyptic number.

31142086 is a deficient number, since it is larger than the sum of its proper divisors (17627114).

31142086 is a wasteful number, since it uses less digits than its factorization.

31142086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6999.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 31142086 is about 5580.5094749494. The cubic root of 31142086 is about 314.6172760046.

Adding to 31142086 its reverse (68024113), we get a palindrome (99166199).

The spelling of 31142086 in words is "thirty-one million, one hundred forty-two thousand, eighty-six".