31310213201 has 4 divisors (see below), whose sum is σ = 31371726900. Its totient is φ = 31248699504.

The previous prime is 31310213189. The next prime is 31310213239. The reversal of 31310213201 is 10231201313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10231201313 = 2551 ⋅4010663.

It can be written as a sum of positive squares in 2 ways, for example, as 11198718976 + 20111494225 = 105824^2 + 141815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31310213201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31310213201.

It is not an unprimeable number, because it can be changed into a prime (31310273201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30756086 + ... + 30757103.

It is an arithmetic number, because the mean of its divisors is an integer number (7842931725).

Almost surely, 2^31310213201 is an apocalyptic number.

It is an amenable number.

31310213201 is a deficient number, since it is larger than the sum of its proper divisors (61513699).

31310213201 is an equidigital number, since it uses as much as digits as its factorization.

31310213201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61513698.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31310213201 its reverse (10231201313), we get a palindrome (41541414514).

The spelling of 31310213201 in words is "thirty-one billion, three hundred ten million, two hundred thirteen thousand, two hundred one".