213510005 has 4 divisors (see below), whose sum is σ = 256212012. Its totient is φ = 170808000.

The previous prime is 213509999. The next prime is 213510013. The reversal of 213510005 is 500015312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22600516 + 190909489 = 4754^2 + 13817^2 .

It is not a de Polignac number, because 213510005 - 2¹² = 213505909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21350996 + ... + 21351005.

It is an arithmetic number, because the mean of its divisors is an integer number (64053003).

Almost surely, 2^213510005 is an apocalyptic number.

It is an amenable number.

213510005 is a deficient number, since it is larger than the sum of its proper divisors (42702007).

213510005 is an equidigital number, since it uses as much as digits as its factorization.

213510005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42702006.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 213510005 is about 14611.9815562435. The cubic root of 213510005 is about 597.6855326217.

Adding to 213510005 its reverse (500015312), we get a palindrome (713525317).

The spelling of 213510005 in words is "two hundred thirteen million, five hundred ten thousand, five".