31203223313 has 4 divisors (see below), whose sum is σ = 31409867328. Its totient is φ = 30996579300.

The previous prime is 31203223273. The next prime is 31203223327. The reversal of 31203223313 is 31332230213.

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 31203223313 - 2³⁰ = 30129481489 is a prime.

It is a super-2 number, since 2×31203223313² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31203223013) 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, 103321781 + ... + 103322082.

It is an arithmetic number, because the mean of its divisors is an integer number (7852466832).

Almost surely, 2^31203223313 is an apocalyptic number.

It is an amenable number.

31203223313 is a deficient number, since it is larger than the sum of its proper divisors (206644015).

31203223313 is a wasteful number, since it uses less digits than its factorization.

31203223313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206644014.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 31203223313 its reverse (31332230213), we get a palindrome (62535453526).

The spelling of 31203223313 in words is "thirty-one billion, two hundred three million, two hundred twenty-three thousand, three hundred thirteen".