213870774155 has 4 divisors (see below), whose sum is σ = 256644928992. Its totient is φ = 171096619320.

The previous prime is 213870774133. The next prime is 213870774167. The reversal of 213870774155 is 551477078312.

213870774155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 213870774155 - 2¹⁰ = 213870773131 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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21387077411 + ... + 21387077420.

It is an arithmetic number, because the mean of its divisors is an integer number (64161232248).

Almost surely, 2^213870774155 is an apocalyptic number.

213870774155 is a deficient number, since it is larger than the sum of its proper divisors (42774154837).

213870774155 is an equidigital number, since it uses as much as digits as its factorization.

213870774155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42774154836.

The product of its (nonzero) digits is 1646400, while the sum is 50.

The spelling of 213870774155 in words is "two hundred thirteen billion, eight hundred seventy million, seven hundred seventy-four thousand, one hundred fifty-five".