31023313313 has 4 divisors (see below), whose sum is σ = 31024642068. Its totient is φ = 31021984560.

The previous prime is 31023313303. The next prime is 31023313319. The reversal of 31023313313 is 31331332013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3256756624 + 27766556689 = 57068^2 + 166633^2 .

It is a cyclic number.

It is not a de Polignac number, because 31023313313 - 2³² = 26728346017 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 (31023313319) 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, 628718 + ... + 676263.

It is an arithmetic number, because the mean of its divisors is an integer number (7756160517).

Almost surely, 2^31023313313 is an apocalyptic number.

It is an amenable number.

31023313313 is a deficient number, since it is larger than the sum of its proper divisors (1328755).

31023313313 is a wasteful number, since it uses less digits than its factorization.

31023313313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328754.

The product of its (nonzero) digits is 1458, while the sum is 23.

Adding to 31023313313 its reverse (31331332013), we get a palindrome (62354645326).

The spelling of 31023313313 in words is "thirty-one billion, twenty-three million, three hundred thirteen thousand, three hundred thirteen".