31442102213 has 4 divisors (see below), whose sum is σ = 31443411660. Its totient is φ = 31440792768.

The previous prime is 31442102203. The next prime is 31442102221. The reversal of 31442102213 is 31220124413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31220124413 = 19979 ⋅1562647.

It can be written as a sum of positive squares in 2 ways, for example, as 10879115809 + 20562986404 = 104303^2 + 143398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31442102213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442102203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618020 + ... + 666957.

It is an arithmetic number, because the mean of its divisors is an integer number (7860852915).

Almost surely, 2^31442102213 is an apocalyptic number.

It is an amenable number.

31442102213 is a deficient number, since it is larger than the sum of its proper divisors (1309447).

31442102213 is a wasteful number, since it uses less digits than its factorization.

31442102213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309446.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 31442102213 its reverse (31220124413), we get a palindrome (62662226626).

The spelling of 31442102213 in words is "thirty-one billion, four hundred forty-two million, one hundred two thousand, two hundred thirteen".