31142842 has 8 divisors (see below), whose sum is σ = 46924416. Its totient is φ = 15501372.

The previous prime is 31142831. The next prime is 31142857. The reversal of 31142842 is 24824113.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34468 + ... + 35359.

It is an arithmetic number, because the mean of its divisors is an integer number (5865552).

Almost surely, 2^31142842 is an apocalyptic number.

31142842 is a deficient number, since it is larger than the sum of its proper divisors (15781574).

31142842 is a wasteful number, since it uses less digits than its factorization.

31142842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70052.

The product of its digits is 1536, while the sum is 25.

The square root of 31142842 is about 5580.5772102893. The cubic root of 31142842 is about 314.6198218492.

Adding to 31142842 its reverse (24824113), we get a palindrome (55966955).

The spelling of 31142842 in words is "thirty-one million, one hundred forty-two thousand, eight hundred forty-two".