31023213303213 has 20 divisors (see below), whose sum is σ = 49069396207260. Its totient is φ = 19465545601152.

The previous prime is 31023213303193. The next prime is 31023213303221. The reversal of 31023213303213 is 31230331232013.

31023213303213 is a `hidden beast` number, since 3 + 1 + 0 + 2 + 3 + 2 + 1 + 330 + 321 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27763646650884 + 3259566652329 = 5269122^2 + 1805427^2 .

It is not a de Polignac number, because 31023213303213 - 2¹³ = 31023213295021 is a prime.

It is a super-2 number, since 2×31023213303213² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023213305213) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11264781958 + ... + 11264784711.

It is an arithmetic number, because the mean of its divisors is an integer number (2453469810363).

Almost surely, 2^{31023213303213} is an apocalyptic number.

It is an amenable number.

31023213303213 is a deficient number, since it is larger than the sum of its proper divisors (18046182904047).

31023213303213 is a wasteful number, since it uses less digits than its factorization.

31023213303213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22529566698 (or 22529566689 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 27.

Adding to 31023213303213 its reverse (31230331232013), we get a palindrome (62253544535226).

The spelling of 31023213303213 in words is "thirty-one trillion, twenty-three billion, two hundred thirteen million, three hundred three thousand, two hundred thirteen".