311223401 has 4 divisors (see below), whose sum is σ = 327603600. Its totient is φ = 294843204.

The previous prime is 311223397. The next prime is 311223413. The reversal of 311223401 is 104322113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104322113 = 7 ⋅14903159.

It is a cyclic number.

It is not a de Polignac number, because 311223401 - 2² = 311223397 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 311223401.

It is not an unprimeable number, because it can be changed into a prime (311223421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8190071 + ... + 8190108.

It is an arithmetic number, because the mean of its divisors is an integer number (81900900).

Almost surely, 2^311223401 is an apocalyptic number.

It is an amenable number.

311223401 is a deficient number, since it is larger than the sum of its proper divisors (16380199).

311223401 is a wasteful number, since it uses less digits than its factorization.

311223401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16380198.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 311223401 is about 17641.5249057444. The cubic root of 311223401 is about 677.6790835710.

Adding to 311223401 its reverse (104322113), we get a palindrome (415545514).

The spelling of 311223401 in words is "three hundred eleven million, two hundred twenty-three thousand, four hundred one".