31224242242 has 24 divisors (see below), whose sum is σ = 47463207876. Its totient is φ = 15405686784.

The previous prime is 31224242233. The next prime is 31224242293. The reversal of 31224242242 is 24224242213.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 21389355001 + 9834887241 = 146251^2 + 99171^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31224242242.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6104278 + ... + 6109390.

Almost surely, 2^31224242242 is an apocalyptic number.

31224242242 is a deficient number, since it is larger than the sum of its proper divisors (16238965634).

31224242242 is a wasteful number, since it uses less digits than its factorization.

31224242242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5590 (or 5481 counting only the distinct ones).

The product of its digits is 12288, while the sum is 28.

Adding to 31224242242 its reverse (24224242213), we get a palindrome (55448484455).

The spelling of 31224242242 in words is "thirty-one billion, two hundred twenty-four million, two hundred forty-two thousand, two hundred forty-two".