313131223 has 4 divisors (see below), whose sum is σ = 326745648. Its totient is φ = 299516800.

The previous prime is 313131193. The next prime is 313131251. The reversal of 313131223 is 322131313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322131313 = 7 ⋅46018759.

It is a cyclic number.

It is not a de Polignac number, because 313131223 - 2⁹ = 313130711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 313131223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313161223) 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, 6807178 + ... + 6807223.

It is an arithmetic number, because the mean of its divisors is an integer number (81686412).

Almost surely, 2^313131223 is an apocalyptic number.

313131223 is a deficient number, since it is larger than the sum of its proper divisors (13614425).

313131223 is a wasteful number, since it uses less digits than its factorization.

313131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13614424.

The product of its digits is 324, while the sum is 19.

The square root of 313131223 is about 17695.5142055833. The cubic root of 313131223 is about 679.0610042773.

Adding to 313131223 its reverse (322131313), we get a palindrome (635262536).

The spelling of 313131223 in words is "three hundred thirteen million, one hundred thirty-one thousand, two hundred twenty-three".