31224042213 has 16 divisors (see below), whose sum is σ = 51239454336. Its totient is φ = 16469824320.

The previous prime is 31224042203. The next prime is 31224042247.

It is a happy number.

31224042213 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31224042213 - 2⁶ = 31224042149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31224042203) 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, 57186618 + ... + 57187163.

It is an arithmetic number, because the mean of its divisors is an integer number (3202465896).

Almost surely, 2^31224042213 is an apocalyptic number.

It is an amenable number.

31224042213 is a deficient number, since it is larger than the sum of its proper divisors (20015412123).

31224042213 is a wasteful number, since it uses less digits than its factorization.

31224042213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114373804.

The product of its (nonzero) digits is 2304, while the sum is 24.

It can be divided in two parts, 312240 and 42213, that added together give a palindrome (354453).

The spelling of 31224042213 in words is "thirty-one billion, two hundred twenty-four million, forty-two thousand, two hundred thirteen".