213571068405 has 16 divisors (see below), whose sum is σ = 341750214720. Its totient is φ = 113892401408.

The previous prime is 213571068401. The next prime is 213571068463. The reversal of 213571068405 is 504860175312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 213571068405 - 2² = 213571068401 is a prime.

It is a super-2 number, since 2×213571068405² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213571068401) 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 15 ways as a sum of consecutive naturals, for example, 614532 + ... + 897101.

It is an arithmetic number, because the mean of its divisors is an integer number (21359388420).

Almost surely, 2^213571068405 is an apocalyptic number.

It is an amenable number.

213571068405 is a deficient number, since it is larger than the sum of its proper divisors (128179146315).

213571068405 is a wasteful number, since it uses less digits than its factorization.

213571068405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521060.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 213571068405 in words is "two hundred thirteen billion, five hundred seventy-one million, sixty-eight thousand, four hundred five".