210542340131 has 4 divisors (see below), whose sum is σ = 210664679064. Its totient is φ = 210420001200.

The previous prime is 210542340109. The next prime is 210542340137. The reversal of 210542340131 is 131043245012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 210542340131 - 2¹⁸ = 210542077987 is a prime.

It is a super-2 number, since 2×210542340131² (a number of 23 digits) contains 22 as substring.

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 210542340131.

It is not an unprimeable number, because it can be changed into a prime (210542340137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61166885 + ... + 61170326.

It is an arithmetic number, because the mean of its divisors is an integer number (52666169766).

Almost surely, 2^210542340131 is an apocalyptic number.

210542340131 is a deficient number, since it is larger than the sum of its proper divisors (122338933).

210542340131 is a wasteful number, since it uses less digits than its factorization.

210542340131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122338932.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 210542340131 its reverse (131043245012), we get a palindrome (341585585143).

The spelling of 210542340131 in words is "two hundred ten billion, five hundred forty-two million, three hundred forty thousand, one hundred thirty-one".