31142063 has 4 divisors (see below), whose sum is σ = 31427880. Its totient is φ = 30856248.

The previous prime is 31142039. The next prime is 31142077. The reversal of 31142063 is 36024113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36024113 = 73 ⋅493481.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31142063 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 (31142003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142745 + ... + 142962.

It is an arithmetic number, because the mean of its divisors is an integer number (7856970).

Almost surely, 2^31142063 is an apocalyptic number.

31142063 is a deficient number, since it is larger than the sum of its proper divisors (285817).

31142063 is a wasteful number, since it uses less digits than its factorization.

31142063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285816.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 31142063 is about 5580.5074142053. The cubic root of 31142063 is about 314.6171985510.

Adding to 31142063 its reverse (36024113), we get a palindrome (67166176).

The spelling of 31142063 in words is "thirty-one million, one hundred forty-two thousand, sixty-three".