213000774655 has 4 divisors (see below), whose sum is σ = 255600929592. Its totient is φ = 170400619720.

The previous prime is 213000774643. The next prime is 213000774713. The reversal of 213000774655 is 556477000312.

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

It is not a de Polignac number, because 213000774655 - 2¹³ = 213000766463 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent 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, 21300077461 + ... + 21300077470.

It is an arithmetic number, because the mean of its divisors is an integer number (63900232398).

Almost surely, 2^213000774655 is an apocalyptic number.

213000774655 is a deficient number, since it is larger than the sum of its proper divisors (42600154937).

213000774655 is an equidigital number, since it uses as much as digits as its factorization.

213000774655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42600154936.

The product of its (nonzero) digits is 176400, while the sum is 40.

Adding to 213000774655 its reverse (556477000312), we get a palindrome (769477774967).

The spelling of 213000774655 in words is "two hundred thirteen billion, seven hundred seventy-four thousand, six hundred fifty-five".