213253605 has 12 divisors (see below), whose sum is σ = 369639660. Its totient is φ = 113735232.

The previous prime is 213253597. The next prime is 213253679. The reversal of 213253605 is 506352312.

213253605 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 53 + 605 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 44435556 + 168818049 = 6666^2 + 12993^2 .

It is not a de Polignac number, because 213253605 - 2³ = 213253597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2369440 + ... + 2369529.

It is an arithmetic number, because the mean of its divisors is an integer number (30803305).

Almost surely, 2^213253605 is an apocalyptic number.

It is an amenable number.

213253605 is a deficient number, since it is larger than the sum of its proper divisors (156386055).

213253605 is a wasteful number, since it uses less digits than its factorization.

213253605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4738980 (or 4738977 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 213253605 is about 14603.2052988376. The cubic root of 213253605 is about 597.4461871554.

The spelling of 213253605 in words is "two hundred thirteen million, two hundred fifty-three thousand, six hundred five".