213102805 has 8 divisors (see below), whose sum is σ = 258113952. Its totient is φ = 168888528.

The previous prime is 213102793. The next prime is 213102811. The reversal of 213102805 is 508201312.

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 213102805 - 2¹³ = 213094613 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 7 ways as a sum of consecutive naturals, for example, 198627 + ... + 199696.

It is an arithmetic number, because the mean of its divisors is an integer number (32264244).

Almost surely, 2^213102805 is an apocalyptic number.

It is an amenable number.

213102805 is a deficient number, since it is larger than the sum of its proper divisors (45011147).

213102805 is a wasteful number, since it uses less digits than its factorization.

213102805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398435.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 213102805 is about 14598.0411357141. The cubic root of 213102805 is about 597.3053280596.

The spelling of 213102805 in words is "two hundred thirteen million, one hundred two thousand, eight hundred five".