213082868881 has 3 divisors (see below), whose sum is σ = 213083330491. Its totient is φ = 213082407272.

The previous prime is 213082868849. The next prime is 213082868927. The reversal of 213082868881 is 188868280312.

The square root of 213082868881 is 461609.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 60733166481 + 152349702400 = 246441^2 + 390320^2 .

It is not a de Polignac number, because 213082868881 - 2⁵ = 213082868849 is a prime.

It is a super-2 number, since 2×213082868881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213082868821) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 230805 + ... + 692413.

Almost surely, 2^213082868881 is an apocalyptic number.

213082868881 is the 461609-th square number.

213082868881 is the 230805-th centered octagonal number.

It is an amenable number.

213082868881 is a deficient number, since it is larger than the sum of its proper divisors (461610).

213082868881 is an frugal number, since it uses more digits than its factorization.

213082868881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923218 (or 461609 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 55.

The spelling of 213082868881 in words is "two hundred thirteen billion, eighty-two million, eight hundred sixty-eight thousand, eight hundred eighty-one".