31224242 has 16 divisors (see below), whose sum is σ = 55373760. Its totient is φ = 12920208.

The previous prime is 31224229. The next prime is 31224269. The reversal of 31224242 is 24242213.

31224242 is a modest number, since divided by 4242 gives 3122 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38048 + ... + 38859.

It is an arithmetic number, because the mean of its divisors is an integer number (3460860).

Almost surely, 2^31224242 is an apocalyptic number.

31224242 is a deficient number, since it is larger than the sum of its proper divisors (24149518).

31224242 is a wasteful number, since it uses less digits than its factorization.

31224242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76945.

The product of its digits is 768, while the sum is 20.

The square root of 31224242 is about 5587.8656032514. The cubic root of 31224242 is about 314.8936972283.

Adding to 31224242 its reverse (24242213), we get a palindrome (55466455).

The spelling of 31224242 in words is "thirty-one million, two hundred twenty-four thousand, two hundred forty-two".