2143231040 has 28 divisors (see below), whose sum is σ = 5103569676. Its totient is φ = 857292288.

The previous prime is 2143231039. The next prime is 2143231043. The reversal of 2143231040 is 401323412.

It can be written as a sum of positive squares in 2 ways, for example, as 1645762624 + 497468416 = 40568^2 + 22304^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (2143231043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3348479 + ... + 3349118.

Almost surely, 2^2143231040 is an apocalyptic number.

2143231040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143231040 is an abundant number, since it is smaller than the sum of its proper divisors (2960338636).

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

2143231040 is an equidigital number, since it uses as much as digits as its factorization.

2143231040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6697614 (or 6697604 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2143231040 is about 46295.0433631939. The cubic root of 2143231040 is about 1289.3069690530.

Adding to 2143231040 its reverse (401323412), we get a palindrome (2544554452).

The spelling of 2143231040 in words is "two billion, one hundred forty-three million, two hundred thirty-one thousand, forty".