210561606043 has 4 divisors (see below), whose sum is σ = 210609937600. Its totient is φ = 210513274488.

The previous prime is 210561606041. The next prime is 210561606109. The reversal of 210561606043 is 340606165012.

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 210561606043 - 2¹ = 210561606041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210561606041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24159243 + ... + 24167956.

It is an arithmetic number, because the mean of its divisors is an integer number (52652484400).

Almost surely, 2^210561606043 is an apocalyptic number.

210561606043 is a deficient number, since it is larger than the sum of its proper divisors (48331557).

210561606043 is an equidigital number, since it uses as much as digits as its factorization.

210561606043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48331556.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 210561606043 in words is "two hundred ten billion, five hundred sixty-one million, six hundred six thousand, forty-three".