213100305 has 32 divisors (see below), whose sum is σ = 375598080. Its totient is φ = 102310080.

The previous prime is 213100273. The next prime is 213100331. The reversal of 213100305 is 503001312.

It is a happy number.

213100305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213100305 - 2⁵ = 213100273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10726 + ... + 23264.

It is an arithmetic number, because the mean of its divisors is an integer number (11737440).

Almost surely, 2^213100305 is an apocalyptic number.

It is an amenable number.

213100305 is a deficient number, since it is larger than the sum of its proper divisors (162497775).

213100305 is a wasteful number, since it uses less digits than its factorization.

213100305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12661.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 213100305 is about 14597.9555075360. The cubic root of 213100305 is about 597.3029923025.

Adding to 213100305 its reverse (503001312), we get a palindrome (716101617).

The spelling of 213100305 in words is "two hundred thirteen million, one hundred thousand, three hundred five".