311401243 has 8 divisors (see below), whose sum is σ = 317454336. Its totient is φ = 305394600.

The previous prime is 311401229. The next prime is 311401247. The reversal of 311401243 is 342104113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 311401243 - 2¹³ = 311393051 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 311401243.

It is not an unprimeable number, because it can be changed into a prime (311401247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2080 + ... + 25042.

It is an arithmetic number, because the mean of its divisors is an integer number (39681792).

Almost surely, 2^311401243 is an apocalyptic number.

311401243 is a deficient number, since it is larger than the sum of its proper divisors (6053093).

311401243 is a wasteful number, since it uses less digits than its factorization.

311401243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23225.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 311401243 is about 17646.5646231781. The cubic root of 311401243 is about 677.8081407631.

Adding to 311401243 its reverse (342104113), we get a palindrome (653505356).

The spelling of 311401243 in words is "three hundred eleven million, four hundred one thousand, two hundred forty-three".