311420133 has 40 divisors (see below), whose sum is σ = 482993280. Its totient is φ = 199817280.

The previous prime is 311420119. The next prime is 311420159. The reversal of 311420133 is 331024113.

It is not a de Polignac number, because 311420133 - 2⁵ = 311420101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311420173) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 261766 + ... + 262952.

It is an arithmetic number, because the mean of its divisors is an integer number (12074832).

Almost surely, 2^311420133 is an apocalyptic number.

It is an amenable number.

311420133 is a deficient number, since it is larger than the sum of its proper divisors (171573147).

311420133 is a wasteful number, since it uses less digits than its factorization.

311420133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319 (or 1310 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 311420133 is about 17647.0998467170. The cubic root of 311420133 is about 677.8218460572.

Adding to 311420133 its reverse (331024113), we get a palindrome (642444246).

The spelling of 311420133 in words is "three hundred eleven million, four hundred twenty thousand, one hundred thirty-three".