213400555 has 16 divisors (see below), whose sum is σ = 267706944. Its totient is φ = 162997120.

The previous prime is 213400549. The next prime is 213400573. The reversal of 213400555 is 555004312.

It is not a de Polignac number, because 213400555 - 2⁹ = 213400043 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76485 + ... + 79225.

It is an arithmetic number, because the mean of its divisors is an integer number (16731684).

Almost surely, 2^213400555 is an apocalyptic number.

213400555 is a deficient number, since it is larger than the sum of its proper divisors (54306389).

213400555 is a wasteful number, since it uses less digits than its factorization.

213400555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3446.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 213400555 is about 14608.2358620061. The cubic root of 213400555 is about 597.5833861785.

Adding to 213400555 its reverse (555004312), we get a palindrome (768404867).

The spelling of 213400555 in words is "two hundred thirteen million, four hundred thousand, five hundred fifty-five".