311134213143 has 18 divisors (see below), whose sum is σ = 486645822936. Its totient is φ = 191467207152.

The previous prime is 311134213139. The next prime is 311134213153. The reversal of 311134213143 is 341312431113.

311134213143 is a `hidden beast` number, since 3 + 1 + 1 + 1 + 342 + 1 + 314 + 3 = 666.

It is not a de Polignac number, because 311134213143 - 2² = 311134213139 is a prime.

It is a super-2 number, since 2×311134213143² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311134213153) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 102277971 + ... + 102281012.

It is an arithmetic number, because the mean of its divisors is an integer number (27035879052).

Almost surely, 2^311134213143 is an apocalyptic number.

311134213143 is a deficient number, since it is larger than the sum of its proper divisors (175511609793).

311134213143 is a wasteful number, since it uses less digits than its factorization.

311134213143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204559015 (or 204558999 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 311134213143 its reverse (341312431113), we get a palindrome (652446644256).

The spelling of 311134213143 in words is "three hundred eleven billion, one hundred thirty-four million, two hundred thirteen thousand, one hundred forty-three".