31233320413 has 4 divisors (see below), whose sum is σ = 31333749408. Its totient is φ = 31132891420.

The previous prime is 31233320407. The next prime is 31233320429. The reversal of 31233320413 is 31402333213.

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: 31402333213 = 163 ⋅192652351.

It is a cyclic number.

It is not a de Polignac number, because 31233320413 - 2⁵ = 31233320381 is a prime.

It is a super-2 number, since 2×31233320413² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31233320453) 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, 50214031 + ... + 50214652.

It is an arithmetic number, because the mean of its divisors is an integer number (7833437352).

Almost surely, 2^31233320413 is an apocalyptic number.

It is an amenable number.

31233320413 is a deficient number, since it is larger than the sum of its proper divisors (100428995).

31233320413 is a wasteful number, since it uses less digits than its factorization.

31233320413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100428994.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 31233320413 its reverse (31402333213), we get a palindrome (62635653626).

The spelling of 31233320413 in words is "thirty-one billion, two hundred thirty-three million, three hundred twenty thousand, four hundred thirteen".