213512788161 has 16 divisors (see below), whose sum is σ = 316949160000. Its totient is φ = 142056595584.

The previous prime is 213512788133. The next prime is 213512788187. The reversal of 213512788161 is 161887215312.

213512788161 is a `hidden beast` number, since 2 + 1 + 3 + 512 + 78 + 8 + 1 + 61 = 666.

It is not a de Polignac number, because 213512788161 - 2¹³ = 213512779969 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213512788121) 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, 7910256 + ... + 7937201.

It is an arithmetic number, because the mean of its divisors is an integer number (19809322500).

Almost surely, 2^213512788161 is an apocalyptic number.

It is an amenable number.

213512788161 is a deficient number, since it is larger than the sum of its proper divisors (103436371839).

213512788161 is a wasteful number, since it uses less digits than its factorization.

213512788161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15847965 (or 15847959 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The spelling of 213512788161 in words is "two hundred thirteen billion, five hundred twelve million, seven hundred eighty-eight thousand, one hundred sixty-one".