31142933 has 4 divisors (see below), whose sum is σ = 31159968. Its totient is φ = 31125900.

The previous prime is 31142927. The next prime is 31142939. The reversal of 31142933 is 33924113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (31142927) and next prime (31142939).

It is a cyclic number.

It is not a de Polignac number, because 31142933 - 2⁶ = 31142869 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 (31142939) 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, 5393 + ... + 9558.

It is an arithmetic number, because the mean of its divisors is an integer number (7789992).

Almost surely, 2^31142933 is an apocalyptic number.

It is an amenable number.

31142933 is a deficient number, since it is larger than the sum of its proper divisors (17035).

31142933 is a wasteful number, since it uses less digits than its factorization.

31142933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17034.

The product of its digits is 1944, while the sum is 26.

The square root of 31142933 is about 5580.5853635618. The cubic root of 31142933 is about 314.6201282907.

The spelling of 31142933 in words is "thirty-one million, one hundred forty-two thousand, nine hundred thirty-three".