213085406 has 4 divisors (see below), whose sum is σ = 319628112. Its totient is φ = 106542702.

The previous prime is 213085349. The next prime is 213085421. The reversal of 213085406 is 604580312.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53271350 + ... + 53271353.

It is an arithmetic number, because the mean of its divisors is an integer number (79907028).

Almost surely, 2^213085406 is an apocalyptic number.

213085406 is a deficient number, since it is larger than the sum of its proper divisors (106542706).

213085406 is a wasteful number, since it uses less digits than its factorization.

213085406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106542705.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 213085406 is about 14597.4451874292. The cubic root of 213085406 is about 597.2890717457.

The spelling of 213085406 in words is "two hundred thirteen million, eighty-five thousand, four hundred six".