33231213013 has 4 divisors (see below), whose sum is σ = 34377116940. Its totient is φ = 32085309088.

The previous prime is 33231212977. The next prime is 33231213017. The reversal of 33231213013 is 31031213233.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31031213233 = 409 ⋅75870937.

It can be written as a sum of positive squares in 2 ways, for example, as 24868659204 + 8362553809 = 157698^2 + 91447^2 .

It is a cyclic number.

It is not a de Polignac number, because 33231213013 - 2²¹ = 33229115861 is a prime.

It is a super-2 number, since 2×33231213013² (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 (33231213017) 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, 572951920 + ... + 572951977.

It is an arithmetic number, because the mean of its divisors is an integer number (8594279235).

Almost surely, 2^33231213013 is an apocalyptic number.

It is an amenable number.

33231213013 is a deficient number, since it is larger than the sum of its proper divisors (1145903927).

33231213013 is a wasteful number, since it uses less digits than its factorization.

33231213013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145903926.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 33231213013 its reverse (31031213233), we get a palindrome (64262426246).

The spelling of 33231213013 in words is "thirty-three billion, two hundred thirty-one million, two hundred thirteen thousand, thirteen".