311142103 has 2 divisors, whose sum is σ = 311142104. Its totient is φ = 311142102.

The previous prime is 311142101. The next prime is 311142107. The reversal of 311142103 is 301241113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311142103 - 2¹ = 311142101 is a prime.

Together with 311142101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311142101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155571051 + 155571052.

It is an arithmetic number, because the mean of its divisors is an integer number (155571052).

Almost surely, 2^311142103 is an apocalyptic number.

311142103 is a deficient number, since it is larger than the sum of its proper divisors (1).

311142103 is an equidigital number, since it uses as much as digits as its factorization.

311142103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 311142103 is about 17639.2205893571. The cubic root of 311142103 is about 677.6200704935.

Adding to 311142103 its reverse (301241113), we get a palindrome (612383216).

The spelling of 311142103 in words is "three hundred eleven million, one hundred forty-two thousand, one hundred three".