213523736481 has 96 divisors (see below), whose sum is σ = 364280716800. Its totient is φ = 119058186240.

The previous prime is 213523736449. The next prime is 213523736507. The reversal of 213523736481 is 184637325312.

213523736481 is a `hidden beast` number, since 2 + 13 + 523 + 7 + 36 + 4 + 81 = 666.

It is not a de Polignac number, because 213523736481 - 2⁵ = 213523736449 is a prime.

It is a super-2 number, since 2×213523736481² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213523736431) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 113034385 + ... + 113036273.

It is an arithmetic number, because the mean of its divisors is an integer number (3794590800).

Almost surely, 2^213523736481 is an apocalyptic number.

It is an amenable number.

213523736481 is a deficient number, since it is larger than the sum of its proper divisors (150756980319).

213523736481 is a wasteful number, since it uses less digits than its factorization.

213523736481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399 (or 3396 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 213523736481 in words is "two hundred thirteen billion, five hundred twenty-three million, seven hundred thirty-six thousand, four hundred eighty-one".