31115242 has 8 divisors (see below), whose sum is σ = 46908000. Its totient is φ = 15479244.

The previous prime is 31115209. The next prime is 31115263. The reversal of 31115242 is 24251113.

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, 38692 + ... + 39487.

It is an arithmetic number, because the mean of its divisors is an integer number (5863500).

Almost surely, 2^31115242 is an apocalyptic number.

31115242 is a deficient number, since it is larger than the sum of its proper divisors (15792758).

31115242 is a wasteful number, since it uses less digits than its factorization.

31115242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78380.

The product of its digits is 240, while the sum is 19.

The square root of 31115242 is about 5578.1037996796. The cubic root of 31115242 is about 314.5268515976.

Adding to 31115242 its reverse (24251113), we get a palindrome (55366355).

The spelling of 31115242 in words is "thirty-one million, one hundred fifteen thousand, two hundred forty-two".