31321300313 has 4 divisors (see below), whose sum is σ = 31324151760. Its totient is φ = 31318448868.

The previous prime is 31321300301. The next prime is 31321300321. The reversal of 31321300313 is 31300312313.

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.

It is a cyclic number.

It is not a de Polignac number, because 31321300313 - 2⁸ = 31321300057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31321300013) 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 3 ways as a sum of consecutive naturals, for example, 1409183 + ... + 1431236.

It is an arithmetic number, because the mean of its divisors is an integer number (7831037940).

Almost surely, 2^31321300313 is an apocalyptic number.

It is an amenable number.

31321300313 is a deficient number, since it is larger than the sum of its proper divisors (2851447).

31321300313 is a wasteful number, since it uses less digits than its factorization.

31321300313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851446.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 31321300313 its reverse (31300312313), we get a palindrome (62621612626).

The spelling of 31321300313 in words is "thirty-one billion, three hundred twenty-one million, three hundred thousand, three hundred thirteen".