31212303442 has 8 divisors (see below), whose sum is σ = 46836244476. Its totient is φ = 15600221952.

The previous prime is 31212303439. The next prime is 31212303443. The reversal of 31212303442 is 24430321213.

It can be written as a sum of positive squares in 2 ways, for example, as 21959979721 + 9252323721 = 148189^2 + 96189^2 .

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

It is not an unprimeable number, because it can be changed into a prime (31212303443) by changing a digit.

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, 2958303 + ... + 2968834.

Almost surely, 2^31212303442 is an apocalyptic number.

31212303442 is a deficient number, since it is larger than the sum of its proper divisors (15623941034).

31212303442 is a wasteful number, since it uses less digits than its factorization.

31212303442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5929772.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31212303442 its reverse (24430321213), we get a palindrome (55642624655).

The spelling of 31212303442 in words is "thirty-one billion, two hundred twelve million, three hundred three thousand, four hundred forty-two".