31312232220002 has 8 divisors (see below), whose sum is σ = 46990163639916. Its totient is φ = 15648844340032.

The previous prime is 31312232219969. The next prime is 31312232220029. The reversal of 31312232220002 is 20002223221313.

It can be written as a sum of positive squares in 2 ways, for example, as 31109499052921 + 202733167081 = 5577589^2 + 450259^2 .

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 31312232220002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3635879603 + ... + 3635888214.

Almost surely, 2^{31312232220002} is an apocalyptic number.

31312232220002 is a deficient number, since it is larger than the sum of its proper divisors (15677931419914).

31312232220002 is a wasteful number, since it uses less digits than its factorization.

31312232220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7271769972.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31312232220002 its reverse (20002223221313), we get a palindrome (51314455441315).

The spelling of 31312232220002 in words is "thirty-one trillion, three hundred twelve billion, two hundred thirty-two million, two hundred twenty thousand, two".