213361420661555 has 32 divisors (see below), whose sum is σ = 257927981875200. Its totient is φ = 169428067488000.

The previous prime is 213361420661537. The next prime is 213361420661567. The reversal of 213361420661555 is 555166024163312.

It is a de Polignac number, because none of the positive numbers 2^k-213361420661555 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8730354026 + ... + 8730378464.

It is an arithmetic number, because the mean of its divisors is an integer number (8060249433600).

Almost surely, 2^{213361420661555} is an apocalyptic number.

213361420661555 is a deficient number, since it is larger than the sum of its proper divisors (44566561213645).

213361420661555 is a wasteful number, since it uses less digits than its factorization.

213361420661555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33035.

The product of its (nonzero) digits is 3888000, while the sum is 50.

The spelling of 213361420661555 in words is "two hundred thirteen trillion, three hundred sixty-one billion, four hundred twenty million, six hundred sixty-one thousand, five hundred fifty-five".