31311321202223 has 8 divisors (see below), whose sum is σ = 32799814062048. Its totient is φ = 29833422598144.

The previous prime is 31311321202159. The next prime is 31311321202243. The reversal of 31311321202223 is 32220212311313.

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 31311321202223 - 2⁶ = 31311321202159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31311321202192 and 31311321202201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311321202243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2648557886 + ... + 2648569707.

It is an arithmetic number, because the mean of its divisors is an integer number (4099976757756).

Almost surely, 2^{31311321202223} is an apocalyptic number.

31311321202223 is a deficient number, since it is larger than the sum of its proper divisors (1488492859825).

31311321202223 is a wasteful number, since it uses less digits than its factorization.

31311321202223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5297127873.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 31311321202223 its reverse (32220212311313), we get a palindrome (63531533513536).

The spelling of 31311321202223 in words is "thirty-one trillion, three hundred eleven billion, three hundred twenty-one million, two hundred two thousand, two hundred twenty-three".