2043215540 has 24 divisors (see below), whose sum is σ = 4516582560. Its totient is φ = 774271008.

The previous prime is 2043215539. The next prime is 2043215543. The reversal of 2043215540 is 455123402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2043215543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2688062 + ... + 2688821.

It is an arithmetic number, because the mean of its divisors is an integer number (188190940).

Almost surely, 2^2043215540 is an apocalyptic number.

2043215540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2043215540 is an abundant number, since it is smaller than the sum of its proper divisors (2473367020).

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

2043215540 is a wasteful number, since it uses less digits than its factorization.

2043215540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5376911 (or 5376909 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2043215540 is about 45201.9417724504. The cubic root of 2043215540 is about 1268.9311568353.

Adding to 2043215540 its reverse (455123402), we get a palindrome (2498338942).

The spelling of 2043215540 in words is "two billion, forty-three million, two hundred fifteen thousand, five hundred forty".