212102305 has 8 divisors (see below), whose sum is σ = 259938432. Its totient is φ = 166071408.

The previous prime is 212102299. The next prime is 212102321. The reversal of 212102305 is 503201212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212102305 - 2¹⁵ = 212069537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451047 + ... + 451516.

It is an arithmetic number, because the mean of its divisors is an integer number (32492304).

Almost surely, 2^212102305 is an apocalyptic number.

It is an amenable number.

212102305 is a deficient number, since it is larger than the sum of its proper divisors (47836127).

212102305 is an equidigital number, since it uses as much as digits as its factorization.

212102305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902615.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 212102305 is about 14563.7325229489. The cubic root of 212102305 is about 596.3690950187.

Adding to 212102305 its reverse (503201212), we get a palindrome (715303517).

The spelling of 212102305 in words is "two hundred twelve million, one hundred two thousand, three hundred five".