31203031213 has 8 divisors (see below), whose sum is σ = 32561876736. Its totient is φ = 29844368400.

The previous prime is 31203031187. The next prime is 31203031217. The reversal of 31203031213 is 31213030213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31203031213 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 (31203031217) 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 7 ways as a sum of consecutive naturals, for example, 393103 + ... + 465763.

It is an arithmetic number, because the mean of its divisors is an integer number (4070234592).

Almost surely, 2^31203031213 is an apocalyptic number.

It is an amenable number.

31203031213 is a deficient number, since it is larger than the sum of its proper divisors (1358845523).

31203031213 is a wasteful number, since it uses less digits than its factorization.

31203031213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91355.

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

Adding to 31203031213 its reverse (31213030213), we get a palindrome (62416061426).

The spelling of 31203031213 in words is "thirty-one billion, two hundred three million, thirty-one thousand, two hundred thirteen".