213166113155 has 16 divisors (see below), whose sum is σ = 263061527904. Its totient is φ = 165751572480.

The previous prime is 213166113151. The next prime is 213166113157. The reversal of 213166113155 is 551311661312.

It is not a de Polignac number, because 213166113155 - 2² = 213166113151 is a prime.

It is a super-2 number, since 2×213166113155² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213166113151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3730526 + ... + 3787235.

It is an arithmetic number, because the mean of its divisors is an integer number (16441345494).

Almost surely, 2^213166113155 is an apocalyptic number.

213166113155 is a deficient number, since it is larger than the sum of its proper divisors (49895414749).

213166113155 is a wasteful number, since it uses less digits than its factorization.

213166113155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7517926.

The product of its digits is 16200, while the sum is 35.

Adding to 213166113155 its reverse (551311661312), we get a palindrome (764477774467).

The spelling of 213166113155 in words is "two hundred thirteen billion, one hundred sixty-six million, one hundred thirteen thousand, one hundred fifty-five".