2143021554 has 24 divisors (see below), whose sum is σ = 4666790700. Its totient is φ = 710713248.

The previous prime is 2143021553. The next prime is 2143021591. The reversal of 2143021554 is 4551203412.

It can be written as a sum of positive squares in 2 ways, for example, as 1507225329 + 635796225 = 38823^2 + 25215^2 .

It is not an unprimeable number, because it can be changed into a prime (2143021553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 298629 + ... + 305720.

Almost surely, 2^2143021554 is an apocalyptic number.

2143021554 is an abundant number, since it is smaller than the sum of its proper divisors (2523769146).

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

2143021554 is a wasteful number, since it uses less digits than its factorization.

2143021554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604554 (or 604551 counting only the distinct ones).

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

The square root of 2143021554 is about 46292.7807978739. The cubic root of 2143021554 is about 1289.2649607401.

Adding to 2143021554 its reverse (4551203412), we get a palindrome (6694224966).

The spelling of 2143021554 in words is "two billion, one hundred forty-three million, twenty-one thousand, five hundred fifty-four".