213155515 has 16 divisors (see below), whose sum is σ = 268130016. Its totient is φ = 162489600.

The previous prime is 213155491. The next prime is 213155519. The reversal of 213155515 is 515551312.

It is not a de Polignac number, because 213155515 - 2⁹ = 213155003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213155519) 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, 3276 + ... + 20905.

It is an arithmetic number, because the mean of its divisors is an integer number (16758126).

Almost surely, 2^213155515 is an apocalyptic number.

213155515 is a deficient number, since it is larger than the sum of its proper divisors (54974501).

213155515 is a wasteful number, since it uses less digits than its factorization.

213155515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24270.

The product of its digits is 3750, while the sum is 28.

The square root of 213155515 is about 14599.8464033016. The cubic root of 213155515 is about 597.3545709096.

The spelling of 213155515 in words is "two hundred thirteen million, one hundred fifty-five thousand, five hundred fifteen".