31514353213 has 4 divisors (see below), whose sum is σ = 36016403680. Its totient is φ = 27012302748.

The previous prime is 31514353207. The next prime is 31514353217. The reversal of 31514353213 is 31235341513.

It is a happy number.

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: 31235341513 = 43 ⋅726403291.

It is a cyclic number.

It is not a de Polignac number, because 31514353213 - 2²⁹ = 30977482301 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 (31514353217) 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, 2251025223 + ... + 2251025236.

It is an arithmetic number, because the mean of its divisors is an integer number (9004100920).

Almost surely, 2^31514353213 is an apocalyptic number.

It is an amenable number.

31514353213 is a deficient number, since it is larger than the sum of its proper divisors (4502050467).

31514353213 is an equidigital number, since it uses as much as digits as its factorization.

31514353213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4502050466.

The product of its digits is 16200, while the sum is 31.

Adding to 31514353213 its reverse (31235341513), we get a palindrome (62749694726).

The spelling of 31514353213 in words is "thirty-one billion, five hundred fourteen million, three hundred fifty-three thousand, two hundred thirteen".