212564503555 has 4 divisors (see below), whose sum is σ = 255077404272. Its totient is φ = 170051602840.

The previous prime is 212564503549. The next prime is 212564503603. The reversal of 212564503555 is 555305465212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 212564503555 - 2¹¹ = 212564501507 is a prime.

It is a super-3 number, since 3×212564503555³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21256450351 + ... + 21256450360.

It is an arithmetic number, because the mean of its divisors is an integer number (63769351068).

Almost surely, 2^212564503555 is an apocalyptic number.

212564503555 is a deficient number, since it is larger than the sum of its proper divisors (42512900717).

212564503555 is an equidigital number, since it uses as much as digits as its factorization.

212564503555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42512900716.

The product of its (nonzero) digits is 900000, while the sum is 43.

Adding to 212564503555 its reverse (555305465212), we get a palindrome (767869968767).

The spelling of 212564503555 in words is "two hundred twelve billion, five hundred sixty-four million, five hundred three thousand, five hundred fifty-five".