31312212004155 has 8 divisors (see below), whose sum is σ = 50099539206672. Its totient is φ = 16699846402208.

The previous prime is 31312212004153. The next prime is 31312212004159. The reversal of 31312212004155 is 55140021221313.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31312212004155 - 2¹ = 31312212004153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31312212004153) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1043740400124 + ... + 1043740400153.

It is an arithmetic number, because the mean of its divisors is an integer number (6262442400834).

Almost surely, 2^{31312212004155} is an apocalyptic number.

31312212004155 is a deficient number, since it is larger than the sum of its proper divisors (18787327202517).

31312212004155 is a wasteful number, since it uses less digits than its factorization.

31312212004155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2087480800285.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 31312212004155 its reverse (55140021221313), we get a palindrome (86452233225468).

The spelling of 31312212004155 in words is "thirty-one trillion, three hundred twelve billion, two hundred twelve million, four thousand, one hundred fifty-five".