213455555 has 8 divisors (see below), whose sum is σ = 256237344. Its totient is φ = 170704000.

The previous prime is 213455549. The next prime is 213455579. The reversal of 213455555 is 555554312.

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

It is not a de Polignac number, because 213455555 - 2¹⁸ = 213193411 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 13130 + ... + 24480.

It is an arithmetic number, because the mean of its divisors is an integer number (32029668).

Almost surely, 2^213455555 is an apocalyptic number.

213455555 is a deficient number, since it is larger than the sum of its proper divisors (42781789).

213455555 is a wasteful number, since it uses less digits than its factorization.

213455555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15117.

The product of its digits is 75000, while the sum is 35.

The square root of 213455555 is about 14610.1182404524. The cubic root of 213455555 is about 597.6347204140.

The spelling of 213455555 in words is "two hundred thirteen million, four hundred fifty-five thousand, five hundred fifty-five".