31142806 has 8 divisors (see below), whose sum is σ = 47411640. Its totient is φ = 15338928.

The previous prime is 31142803. The next prime is 31142807. The reversal of 31142806 is 60824113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31142803) 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, 116071 + ... + 116338.

It is an arithmetic number, because the mean of its divisors is an integer number (5926455).

Almost surely, 2^31142806 is an apocalyptic number.

31142806 is a deficient number, since it is larger than the sum of its proper divisors (16268834).

31142806 is a wasteful number, since it uses less digits than its factorization.

31142806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232478.

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

The square root of 31142806 is about 5580.5739848155. The cubic root of 31142806 is about 314.6197006195.

Adding to 31142806 its reverse (60824113), we get a palindrome (91966919).

The spelling of 31142806 in words is "thirty-one million, one hundred forty-two thousand, eight hundred six".