213778855155 has 16 divisors (see below), whose sum is σ = 342059592960. Its totient is φ = 114010914528.

The previous prime is 213778855151. The next prime is 213778855177. The reversal of 213778855155 is 551558877312.

It is not a de Polignac number, because 213778855155 - 2² = 213778855151 is a prime.

It is a super-3 number, since 3×213778855155³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 213778855095 and 213778855104.

It is not an unprimeable number, because it can be changed into a prime (213778855151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135084 + ... + 667686.

It is an arithmetic number, because the mean of its divisors is an integer number (21378724560).

Almost surely, 2^213778855155 is an apocalyptic number.

213778855155 is a deficient number, since it is larger than the sum of its proper divisors (128280737805).

213778855155 is a wasteful number, since it uses less digits than its factorization.

213778855155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559370.

The product of its digits is 11760000, while the sum is 57.

The spelling of 213778855155 in words is "two hundred thirteen billion, seven hundred seventy-eight million, eight hundred fifty-five thousand, one hundred fifty-five".