311223023 has 4 divisors (see below), whose sum is σ = 311532480. Its totient is φ = 310913568.

The previous prime is 311223007. The next prime is 311223061. The reversal of 311223023 is 320322113.

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 311223023 - 2⁴ = 311223007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311222992 and 311223010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311223083) 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, 153215 + ... + 155232.

It is an arithmetic number, because the mean of its divisors is an integer number (77883120).

Almost surely, 2^311223023 is an apocalyptic number.

311223023 is a deficient number, since it is larger than the sum of its proper divisors (309457).

311223023 is a wasteful number, since it uses less digits than its factorization.

311223023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309456.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 311223023 is about 17641.5141923816. The cubic root of 311223023 is about 677.6788092099.

Adding to 311223023 its reverse (320322113), we get a palindrome (631545136).

The spelling of 311223023 in words is "three hundred eleven million, two hundred twenty-three thousand, twenty-three".