31233433213 has 4 divisors (see below), whose sum is σ = 31542675228. Its totient is φ = 30924191200.

The previous prime is 31233433207. The next prime is 31233433223.

31233433213 is nontrivially palindromic in base 10.

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 29023211044 + 2210222169 = 170362^2 + 47013^2 .

It is a cyclic number.

It is not a de Polignac number, because 31233433213 - 2⁵ = 31233433181 is a prime.

It is a super-4 number, since 4×31233433213⁴ (a number of 43 digits) contains 4444 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 (31233433223) 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, 154620856 + ... + 154621057.

It is an arithmetic number, because the mean of its divisors is an integer number (7885668807).

Almost surely, 2^31233433213 is an apocalyptic number.

It is an amenable number.

31233433213 is a deficient number, since it is larger than the sum of its proper divisors (309242015).

31233433213 is a wasteful number, since it uses less digits than its factorization.

31233433213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309242014.

The product of its digits is 11664, while the sum is 28.

The spelling of 31233433213 in words is "thirty-one billion, two hundred thirty-three million, four hundred thirty-three thousand, two hundred thirteen".