31124242 has 16 divisors (see below), whose sum is σ = 49350240. Its totient is φ = 14681088.

The previous prime is 31124237. The next prime is 31124243. The reversal of 31124242 is 24242113.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (31124243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8173 + ... + 11359.

It is an arithmetic number, because the mean of its divisors is an integer number (3084390).

Almost surely, 2^31124242 is an apocalyptic number.

31124242 is a deficient number, since it is larger than the sum of its proper divisors (18225998).

31124242 is a wasteful number, since it uses less digits than its factorization.

31124242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3465.

The product of its digits is 384, while the sum is 19.

The square root of 31124242 is about 5578.9104671074. The cubic root of 31124242 is about 314.5571740227.

Adding to 31124242 its reverse (24242113), we get a palindrome (55366355).

The spelling of 31124242 in words is "thirty-one million, one hundred twenty-four thousand, two hundred forty-two".