31211003223 has 24 divisors (see below), whose sum is σ = 46104829056. Its totient is φ = 20340262800.

The previous prime is 31211003203. The next prime is 31211003231. The reversal of 31211003223 is 32230011213.

It is a de Polignac number, because none of the positive numbers 2^k-31211003223 is a prime.

It is a super-2 number, since 2×31211003223² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31211003196 and 31211003205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211003203) 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 23 ways as a sum of consecutive naturals, for example, 118563 + ... + 276548.

It is an arithmetic number, because the mean of its divisors is an integer number (1921034544).

Almost surely, 2^31211003223 is an apocalyptic number.

31211003223 is a deficient number, since it is larger than the sum of its proper divisors (14893825833).

31211003223 is a wasteful number, since it uses less digits than its factorization.

31211003223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395315 (or 395312 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31211003223 its reverse (32230011213), we get a palindrome (63441014436).

The spelling of 31211003223 in words is "thirty-one billion, two hundred eleven million, three thousand, two hundred twenty-three".