311142133 has 8 divisors (see below), whose sum is σ = 325581056. Its totient is φ = 296978400.

The previous prime is 311142121. The next prime is 311142163. The reversal of 311142133 is 331241113.

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 311142133 - 2⁵ = 311142101 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 311142133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311142103) 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, 66483 + ... + 71008.

It is an arithmetic number, because the mean of its divisors is an integer number (40697632).

Almost surely, 2^311142133 is an apocalyptic number.

It is an amenable number.

311142133 is a deficient number, since it is larger than the sum of its proper divisors (14438923).

311142133 is a wasteful number, since it uses less digits than its factorization.

311142133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137595.

The product of its digits is 216, while the sum is 19.

The square root of 311142133 is about 17639.2214397348. The cubic root of 311142133 is about 677.6200922720.

Adding to 311142133 its reverse (331241113), we get a palindrome (642383246).

It can be divided in two parts, 31114213 and 3, that added together give a triangular number (31114216 = T₇₈₈₈).

The spelling of 311142133 in words is "three hundred eleven million, one hundred forty-two thousand, one hundred thirty-three".