311334421 has 4 divisors (see below), whose sum is σ = 311405932. Its totient is φ = 311262912.

The previous prime is 311334409. The next prime is 311334451. The reversal of 311334421 is 124433113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 190026225 + 121308196 = 13785^2 + 11014^2 .

It is a cyclic number.

It is not a de Polignac number, because 311334421 - 2⁷ = 311334293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311334392 and 311334401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311334451) 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, 28770 + ... + 38083.

It is an arithmetic number, because the mean of its divisors is an integer number (77851483).

Almost surely, 2^311334421 is an apocalyptic number.

It is an amenable number.

311334421 is a deficient number, since it is larger than the sum of its proper divisors (71511).

311334421 is an equidigital number, since it uses as much as digits as its factorization.

311334421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71510.

The product of its digits is 864, while the sum is 22.

The square root of 311334421 is about 17644.6711785740. The cubic root of 311334421 is about 677.7596548341.

Adding to 311334421 its reverse (124433113), we get a palindrome (435767534).

The spelling of 311334421 in words is "three hundred eleven million, three hundred thirty-four thousand, four hundred twenty-one".