213689454881 has 16 divisors (see below), whose sum is σ = 245033241600. Its totient is φ = 182550688848.

The previous prime is 213689454857. The next prime is 213689454947. The reversal of 213689454881 is 188454986312.

It is a cyclic number.

It is not a de Polignac number, because 213689454881 - 2⁶ = 213689454817 is a prime.

It is a super-2 number, since 2×213689454881² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213689454881.

It is not an unprimeable number, because it can be changed into a prime (213689453881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3083510 + ... + 3152048.

It is an arithmetic number, because the mean of its divisors is an integer number (15314577600).

Almost surely, 2^213689454881 is an apocalyptic number.

It is an amenable number.

213689454881 is a deficient number, since it is larger than the sum of its proper divisors (31343786719).

213689454881 is a wasteful number, since it uses less digits than its factorization.

213689454881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70028.

The product of its digits is 13271040, while the sum is 59.

The spelling of 213689454881 in words is "two hundred thirteen billion, six hundred eighty-nine million, four hundred fifty-four thousand, eight hundred eighty-one".