2143550421 has 12 divisors (see below), whose sum is σ = 3139849440. Its totient is φ = 1408905960.

The previous prime is 2143550419. The next prime is 2143550429. The reversal of 2143550421 is 1240553412.

It is not a de Polignac number, because 2143550421 - 2¹ = 2143550419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143550429) 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, 1676631 + ... + 1677908.

It is an arithmetic number, because the mean of its divisors is an integer number (261654120).

Almost surely, 2^2143550421 is an apocalyptic number.

It is an amenable number.

2143550421 is a deficient number, since it is larger than the sum of its proper divisors (996299019).

2143550421 is a wasteful number, since it uses less digits than its factorization.

2143550421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354616 (or 3354613 counting only the distinct ones).

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

The square root of 2143550421 is about 46298.4926428496. The cubic root of 2143550421 is about 1289.3710093872.

The spelling of 2143550421 in words is "two billion, one hundred forty-three million, five hundred fifty thousand, four hundred twenty-one".