213505115 has 4 divisors (see below), whose sum is σ = 256206144. Its totient is φ = 170804088.

The previous prime is 213505111. The next prime is 213505121. The reversal of 213505115 is 511505312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213505115 - 2² = 213505111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213505111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21350507 + ... + 21350516.

It is an arithmetic number, because the mean of its divisors is an integer number (64051536).

Almost surely, 2^213505115 is an apocalyptic number.

213505115 is a deficient number, since it is larger than the sum of its proper divisors (42701029).

213505115 is an equidigital number, since it uses as much as digits as its factorization.

213505115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42701028.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 213505115 is about 14611.8142268508. The cubic root of 213505115 is about 597.6809696746.

The spelling of 213505115 in words is "two hundred thirteen million, five hundred five thousand, one hundred fifteen".