311440401 has 12 divisors (see below), whose sum is σ = 469417728. Its totient is φ = 198599544.

The previous prime is 311440397. The next prime is 311440417. The reversal of 311440401 is 104044113.

It is not a de Polignac number, because 311440401 - 2² = 311440397 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (311440421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 752065 + ... + 752478.

It is an arithmetic number, because the mean of its divisors is an integer number (39118144).

Almost surely, 2^311440401 is an apocalyptic number.

It is an amenable number.

311440401 is a deficient number, since it is larger than the sum of its proper divisors (157977327).

311440401 is a wasteful number, since it uses less digits than its factorization.

311440401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504572 (or 1504569 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 311440401 is about 17647.6740960388. The cubic root of 311440401 is about 677.8365505177.

Adding to 311440401 its reverse (104044113), we get a palindrome (415484514).

The spelling of 311440401 in words is "three hundred eleven million, four hundred forty thousand, four hundred one".