213507171026 has 16 divisors (see below), whose sum is σ = 321365288160. Its totient is φ = 106385949120.

The previous prime is 213507171019. The next prime is 213507171041. The reversal of 213507171026 is 620171705312.

It is a super-2 number, since 2×213507171026² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659066 + ... + 928106.

It is an arithmetic number, because the mean of its divisors is an integer number (20085330510).

Almost surely, 2^213507171026 is an apocalyptic number.

213507171026 is a deficient number, since it is larger than the sum of its proper divisors (107858117134).

213507171026 is a wasteful number, since it uses less digits than its factorization.

213507171026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270409.

The product of its (nonzero) digits is 17640, while the sum is 35.

Adding to 213507171026 its reverse (620171705312), we get a palindrome (833678876338).

The spelling of 213507171026 in words is "two hundred thirteen billion, five hundred seven million, one hundred seventy-one thousand, twenty-six".