2143550140 has 24 divisors (see below), whose sum is σ = 4514222160. Its totient is φ = 854988288.

The previous prime is 2143550117. The next prime is 2143550141. The reversal of 2143550140 is 410553412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143550141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144750 + ... + 158869.

It is an arithmetic number, because the mean of its divisors is an integer number (188092590).

Almost surely, 2^2143550140 is an apocalyptic number.

2143550140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143550140 is an abundant number, since it is smaller than the sum of its proper divisors (2370672020).

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

2143550140 is a wasteful number, since it uses less digits than its factorization.

2143550140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303981 (or 303979 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2143550140 is about 46298.4896081935. The cubic root of 2143550140 is about 1289.3709530456.

The spelling of 2143550140 in words is "two billion, one hundred forty-three million, five hundred fifty thousand, one hundred forty".