2122321554 has 64 divisors (see below), whose sum is σ = 4910426880. Its totient is φ = 678844800.

The previous prime is 2122321543. The next prime is 2122321561. The reversal of 2122321554 is 4551232212.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138579 + ... + 153129.

It is an arithmetic number, because the mean of its divisors is an integer number (76725420).

Almost surely, 2^2122321554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2122321554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2455213440).

2122321554 is an abundant number, since it is smaller than the sum of its proper divisors (2788105326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2122321554 is a wasteful number, since it uses less digits than its factorization.

2122321554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14672 (or 14666 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 2122321554 is about 46068.6613002809. The cubic root of 2122321554 is about 1285.1004083097.

Adding to 2122321554 its reverse (4551232212), we get a palindrome (6673553766).

The spelling of 2122321554 in words is "two billion, one hundred twenty-two million, three hundred twenty-one thousand, five hundred fifty-four".