213257534427 has 40 divisors (see below), whose sum is σ = 364126752000. Its totient is φ = 121845761136.

The previous prime is 213257534417. The next prime is 213257534431. The reversal of 213257534427 is 724435752312.

213257534427 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 575 + 34 + 42 + 7 = 666.

It is not a de Polignac number, because 213257534427 - 2⁶ = 213257534363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213257534417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5491324 + ... + 5530022.

It is an arithmetic number, because the mean of its divisors is an integer number (9103168800).

Almost surely, 2^213257534427 is an apocalyptic number.

213257534427 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

213257534427 is a deficient number, since it is larger than the sum of its proper divisors (150869217573).

213257534427 is an equidigital number, since it uses as much as digits as its factorization.

213257534427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48437 (or 48428 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 45.

The spelling of 213257534427 in words is "two hundred thirteen billion, two hundred fifty-seven million, five hundred thirty-four thousand, four hundred twenty-seven".