213103223131 has 4 divisors (see below), whose sum is σ = 214410605032. Its totient is φ = 211795841232.

The previous prime is 213103223117. The next prime is 213103223141. The reversal of 213103223131 is 131322301312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213103223131 is a prime.

It is a super-2 number, since 2×213103223131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213103223141) 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, 653690706 + ... + 653691031.

It is an arithmetic number, because the mean of its divisors is an integer number (53602651258).

Almost surely, 2^213103223131 is an apocalyptic number.

213103223131 is a deficient number, since it is larger than the sum of its proper divisors (1307381901).

213103223131 is a wasteful number, since it uses less digits than its factorization.

213103223131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307381900.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 213103223131 its reverse (131322301312), we get a palindrome (344425524443).

The spelling of 213103223131 in words is "two hundred thirteen billion, one hundred three million, two hundred twenty-three thousand, one hundred thirty-one".