33231312213 has 16 divisors (see below), whose sum is σ = 48644337216. Its totient is φ = 20011904640.

The previous prime is 33231312211. The next prime is 33231312253. The reversal of 33231312213 is 31221313233.

It is not a de Polignac number, because 33231312213 - 2¹ = 33231312211 is a prime.

It is a super-2 number, since 2×33231312213² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33231312211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3201856 + ... + 3212217.

It is an arithmetic number, because the mean of its divisors is an integer number (3040271076).

Almost surely, 2^33231312213 is an apocalyptic number.

33231312213 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

33231312213 is a deficient number, since it is larger than the sum of its proper divisors (15413025003).

33231312213 is a wasteful number, since it uses less digits than its factorization.

33231312213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6414244.

The product of its digits is 1944, while the sum is 24.

Adding to 33231312213 its reverse (31221313233), we get a palindrome (64452625446).

The spelling of 33231312213 in words is "thirty-three billion, two hundred thirty-one million, three hundred twelve thousand, two hundred thirteen".