213181869601 has 4 divisors (see below), whose sum is σ = 215379620932. Its totient is φ = 210984118272.

The previous prime is 213181869577. The next prime is 213181869623. The reversal of 213181869601 is 106968181312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 156796992576 + 56384877025 = 395976^2 + 237455^2 .

It is a cyclic number.

It is not a de Polignac number, because 213181869601 - 2⁵ = 213181869569 is a prime.

It is a super-3 number, since 3×213181869601³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213181869401) 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, 1098875520 + ... + 1098875713.

It is an arithmetic number, because the mean of its divisors is an integer number (53844905233).

Almost surely, 2^213181869601 is an apocalyptic number.

It is an amenable number.

213181869601 is a deficient number, since it is larger than the sum of its proper divisors (2197751331).

213181869601 is an equidigital number, since it uses as much as digits as its factorization.

213181869601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197751330.

The product of its (nonzero) digits is 124416, while the sum is 46.

The spelling of 213181869601 in words is "two hundred thirteen billion, one hundred eighty-one million, eight hundred sixty-nine thousand, six hundred one".