211724880893 has 4 divisors (see below), whose sum is σ = 211730124060. Its totient is φ = 211719637728.

The previous prime is 211724880881. The next prime is 211724880901. The reversal of 211724880893 is 398088427112.

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 30498431044 + 181226449849 = 174638^2 + 425707^2 .

It is a cyclic number.

It is not a de Polignac number, because 211724880893 - 2²⁸ = 211456445437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211724880793) 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, 2560538 + ... + 2641931.

It is an arithmetic number, because the mean of its divisors is an integer number (52932531015).

Almost surely, 2^211724880893 is an apocalyptic number.

It is an amenable number.

211724880893 is a deficient number, since it is larger than the sum of its proper divisors (5243167).

211724880893 is an equidigital number, since it uses as much as digits as its factorization.

211724880893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5243166.

The product of its (nonzero) digits is 1548288, while the sum is 53.

The spelling of 211724880893 in words is "two hundred eleven billion, seven hundred twenty-four million, eight hundred eighty thousand, eight hundred ninety-three".