213455405 has 16 divisors (see below), whose sum is σ = 276919680. Its totient is φ = 157401792.

The previous prime is 213455353. The next prime is 213455413. The reversal of 213455405 is 504554312.

It is a cyclic number.

It is not a de Polignac number, because 213455405 - 2⁸ = 213455149 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26849 + ... + 33878.

It is an arithmetic number, because the mean of its divisors is an integer number (17307480).

Almost surely, 2^213455405 is an apocalyptic number.

It is an amenable number.

213455405 is a deficient number, since it is larger than the sum of its proper divisors (63464275).

213455405 is a wasteful number, since it uses less digits than its factorization.

213455405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60788.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 213455405 is about 14610.1131070228. The cubic root of 213455405 is about 597.6345804235.

The spelling of 213455405 in words is "two hundred thirteen million, four hundred fifty-five thousand, four hundred five".