31204142 has 8 divisors (see below), whose sum is σ = 47447616. Its totient is φ = 15388272.

The previous prime is 31204133. The next prime is 31204189. The reversal of 31204142 is 24140213.

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

It is a self number, because there is not a number n which added to its sum of digits gives 31204142.

It is a congruent number.

It is an unprimeable number.

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, 106718 + ... + 107009.

It is an arithmetic number, because the mean of its divisors is an integer number (5930952).

Almost surely, 2^31204142 is an apocalyptic number.

31204142 is a deficient number, since it is larger than the sum of its proper divisors (16243474).

31204142 is a wasteful number, since it uses less digits than its factorization.

31204142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213802.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 31204142 is about 5586.0667736790. The cubic root of 31204142 is about 314.8261138216.

Adding to 31204142 its reverse (24140213), we get a palindrome (55344355).

The spelling of 31204142 in words is "thirty-one million, two hundred four thousand, one hundred forty-two".