31140302213 has 4 divisors (see below), whose sum is σ = 31176554880. Its totient is φ = 31104049548.

The previous prime is 31140302203. The next prime is 31140302287. The reversal of 31140302213 is 31220304113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31220304113 = 23557 ⋅1325309.

It is a cyclic number.

It is not a de Polignac number, because 31140302213 - 2⁴ = 31140302197 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 (31140302203) 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, 18125045 + ... + 18126762.

It is an arithmetic number, because the mean of its divisors is an integer number (7794138720).

Almost surely, 2^31140302213 is an apocalyptic number.

It is an amenable number.

31140302213 is a deficient number, since it is larger than the sum of its proper divisors (36252667).

31140302213 is an equidigital number, since it uses as much as digits as its factorization.

31140302213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36252666.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31140302213 its reverse (31220304113), we get a palindrome (62360606326).

The spelling of 31140302213 in words is "thirty-one billion, one hundred forty million, three hundred two thousand, two hundred thirteen".