311009421 has 4 divisors (see below), whose sum is σ = 414679232. Its totient is φ = 207339612.

The previous prime is 311009417. The next prime is 311009429. The reversal of 311009421 is 124900113.

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.

It is not a de Polignac number, because 311009421 - 2² = 311009417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311009429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51834901 + ... + 51834906.

It is an arithmetic number, because the mean of its divisors is an integer number (103669808).

Almost surely, 2^311009421 is an apocalyptic number.

It is an amenable number.

311009421 is a deficient number, since it is larger than the sum of its proper divisors (103669811).

311009421 is a wasteful number, since it uses less digits than its factorization.

311009421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103669810.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 311009421 is about 17635.4591944752. The cubic root of 311009421 is about 677.5237364087.

Adding to 311009421 its reverse (124900113), we get a palindrome (435909534).

The spelling of 311009421 in words is "three hundred eleven million, nine thousand, four hundred twenty-one".