213819115 has 16 divisors (see below), whose sum is σ = 279022752. Its totient is φ = 156639744.

The previous prime is 213819107. The next prime is 213819157. The reversal of 213819115 is 511918312.

It is a cyclic number.

It is not a de Polignac number, because 213819115 - 2³ = 213819107 is a prime.

It is a super-2 number, since 2×213819115² = 91437227878766450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30849 + ... + 37138.

It is an arithmetic number, because the mean of its divisors is an integer number (17438922).

Almost surely, 2^213819115 is an apocalyptic number.

213819115 is a deficient number, since it is larger than the sum of its proper divisors (65203637).

213819115 is a wasteful number, since it uses less digits than its factorization.

213819115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68046.

The product of its digits is 2160, while the sum is 31.

The square root of 213819115 is about 14622.5550092998. Note that the first 3 decimals coincide. The cubic root of 213819115 is about 597.9738274470.

The spelling of 213819115 in words is "two hundred thirteen million, eight hundred nineteen thousand, one hundred fifteen".