2122321555 has 8 divisors (see below), whose sum is σ = 2561014800. Its totient is φ = 1688371296.

The previous prime is 2122321543. The next prime is 2122321561. The reversal of 2122321555 is 5551232212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2122321555 - 2¹³ = 2122313363 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1184760 + ... + 1186549.

It is an arithmetic number, because the mean of its divisors is an integer number (320126850).

Almost surely, 2^2122321555 is an apocalyptic number.

2122321555 is a deficient number, since it is larger than the sum of its proper divisors (438693245).

2122321555 is a wasteful number, since it uses less digits than its factorization.

2122321555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371493.

The product of its digits is 6000, while the sum is 28.

The square root of 2122321555 is about 46068.6613111343. The cubic root of 2122321555 is about 1285.1004085115.

Adding to 2122321555 its reverse (5551232212), we get a palindrome (7673553767).

It can be divided in two parts, 21223 and 21555, that added together give a triangular number (42778 = T₂₉₂).

The spelling of 2122321555 in words is "two billion, one hundred twenty-two million, three hundred twenty-one thousand, five hundred fifty-five".