31301230213 has 12 divisors (see below), whose sum is σ = 34410108460. Its totient is φ = 28451839680.

The previous prime is 31301230189. The next prime is 31301230223. The reversal of 31301230213 is 31203210313.

It can be written as a sum of positive squares in 2 ways, for example, as 13871421729 + 17429808484 = 117777^2 + 132022^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31301230213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301230223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1293481 + ... + 1317457.

Almost surely, 2^31301230213 is an apocalyptic number.

It is an amenable number.

31301230213 is a deficient number, since it is larger than the sum of its proper divisors (3108878247).

31301230213 is a wasteful number, since it uses less digits than its factorization.

31301230213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34788 (or 34777 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31301230213 its reverse (31203210313), we get a palindrome (62504440526).

The spelling of 31301230213 in words is "thirty-one billion, three hundred one million, two hundred thirty thousand, two hundred thirteen".