210231135871 has 2 divisors, whose sum is σ = 210231135872. Its totient is φ = 210231135870.

The previous prime is 210231135857. The next prime is 210231135889. The reversal of 210231135871 is 178531132012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210231135871 - 2¹³ = 210231127679 is a prime.

It is a super-2 number, since 2×210231135871² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210231135811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105115567935 + 105115567936.

It is an arithmetic number, because the mean of its divisors is an integer number (105115567936).

Almost surely, 2^210231135871 is an apocalyptic number.

210231135871 is a deficient number, since it is larger than the sum of its proper divisors (1).

210231135871 is an equidigital number, since it uses as much as digits as its factorization.

210231135871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

Adding to 210231135871 its reverse (178531132012), we get a palindrome (388762267883).

The spelling of 210231135871 in words is "two hundred ten billion, two hundred thirty-one million, one hundred thirty-five thousand, eight hundred seventy-one".