213222322031 has 4 divisors (see below), whose sum is σ = 213223252200. Its totient is φ = 213221391864.

The previous prime is 213222321979. The next prime is 213222322069. The reversal of 213222322031 is 130223222312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213222322031 is a prime.

It is a super-2 number, since 2×213222322031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213222321988 and 213222322006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213222322091) 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, 149285 + ... + 669873.

It is an arithmetic number, because the mean of its divisors is an integer number (53305813050).

Almost surely, 2^213222322031 is an apocalyptic number.

213222322031 is a deficient number, since it is larger than the sum of its proper divisors (930169).

213222322031 is an equidigital number, since it uses as much as digits as its factorization.

213222322031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930168.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 213222322031 its reverse (130223222312), we get a palindrome (343445544343).

The spelling of 213222322031 in words is "two hundred thirteen billion, two hundred twenty-two million, three hundred twenty-two thousand, thirty-one".