52181212491 has 6 divisors (see below), whose sum is σ = 75372862500. Its totient is φ = 34787474988.

The previous prime is 52181212453. The next prime is 52181212543. The reversal of 52181212491 is 19421218125.

52181212491 is a `hidden beast` number, since 521 + 8 + 1 + 2 + 124 + 9 + 1 = 666.

52181212491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 52181212491 - 2¹⁷ = 52181081419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52181211491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2898956241 + ... + 2898956258.

It is an arithmetic number, because the mean of its divisors is an integer number (12562143750).

Almost surely, 2^52181212491 is an apocalyptic number.

52181212491 is a deficient number, since it is larger than the sum of its proper divisors (23191650009).

52181212491 is a wasteful number, since it uses less digits than its factorization.

52181212491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5797912505 (or 5797912502 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The spelling of 52181212491 in words is "fifty-two billion, one hundred eighty-one million, two hundred twelve thousand, four hundred ninety-one".