1331131223 has 4 divisors (see below), whose sum is σ = 1333865040. Its totient is φ = 1328397408.

The previous prime is 1331131213. The next prime is 1331131231. The reversal of 1331131223 is 3221311331.

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 1331131223 - 2¹⁴ = 1331114839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331131195 and 1331131204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331131213) 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, 1366178 + ... + 1367151.

It is an arithmetic number, because the mean of its divisors is an integer number (333466260).

Almost surely, 2^1331131223 is an apocalyptic number.

1331131223 is a deficient number, since it is larger than the sum of its proper divisors (2733817).

1331131223 is an equidigital number, since it uses as much as digits as its factorization.

1331131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733816.

The product of its digits is 324, while the sum is 20.

The square root of 1331131223 is about 36484.6710688201. The cubic root of 1331131223 is about 1100.0361483988.

Adding to 1331131223 its reverse (3221311331), we get a palindrome (4552442554).

The spelling of 1331131223 in words is "one billion, three hundred thirty-one million, one hundred thirty-one thousand, two hundred twenty-three".