213013131223 has 4 divisors (see below), whose sum is σ = 220358411640. Its totient is φ = 205667850808.

The previous prime is 213013131209. The next prime is 213013131239. The reversal of 213013131223 is 322131310312.

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

It is a cyclic number.

It is not a de Polignac number, because 213013131223 - 2⁹ = 213013130711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213013131194 and 213013131203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213013131263) 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, 3672640165 + ... + 3672640222.

It is an arithmetic number, because the mean of its divisors is an integer number (55089602910).

Almost surely, 2^213013131223 is an apocalyptic number.

213013131223 is a deficient number, since it is larger than the sum of its proper divisors (7345280417).

213013131223 is an equidigital number, since it uses as much as digits as its factorization.

213013131223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7345280416.

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

Adding to 213013131223 its reverse (322131310312), we get a palindrome (535144441535).

The spelling of 213013131223 in words is "two hundred thirteen billion, thirteen million, one hundred thirty-one thousand, two hundred twenty-three".