31224143242 has 8 divisors (see below), whose sum is σ = 46875477636. Its totient is φ = 15598984032.

The previous prime is 31224143239. The next prime is 31224143257. The reversal of 31224143242 is 24234142213.

It can be written as a sum of positive squares in 2 ways, for example, as 31091916241 + 132227001 = 176329^2 + 11499^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 31224143242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6540813 + ... + 6545584.

Almost surely, 2^31224143242 is an apocalyptic number.

31224143242 is a deficient number, since it is larger than the sum of its proper divisors (15651334394).

31224143242 is a wasteful number, since it uses less digits than its factorization.

31224143242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13087592.

The product of its digits is 9216, while the sum is 28.

Adding to 31224143242 its reverse (24234142213), we get a palindrome (55458285455).

The spelling of 31224143242 in words is "thirty-one billion, two hundred twenty-four million, one hundred forty-three thousand, two hundred forty-two".