31240313321 has 4 divisors (see below), whose sum is σ = 35703215232. Its totient is φ = 26777411412.

The previous prime is 31240313309. The next prime is 31240313369. The reversal of 31240313321 is 12331304213.

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: 12331304213 = 461 ⋅26749033.

It is a cyclic number.

It is not a de Polignac number, because 31240313321 - 2²² = 31236119017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31240303321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2231450945 + ... + 2231450958.

It is an arithmetic number, because the mean of its divisors is an integer number (8925803808).

Almost surely, 2^31240313321 is an apocalyptic number.

It is an amenable number.

31240313321 is a deficient number, since it is larger than the sum of its proper divisors (4462901911).

31240313321 is an equidigital number, since it uses as much as digits as its factorization.

31240313321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4462901910.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31240313321 its reverse (12331304213), we get a palindrome (43571617534).

The spelling of 31240313321 in words is "thirty-one billion, two hundred forty million, three hundred thirteen thousand, three hundred twenty-one".