2147043540 has 24 divisors (see below), whose sum is σ = 6011722080. Its totient is φ = 572544928.

The previous prime is 2147043533. The next prime is 2147043541. The reversal of 2147043540 is 453407412.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2147043498 and 2147043507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147043541) 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, 17891970 + ... + 17892089.

It is an arithmetic number, because the mean of its divisors is an integer number (250488420).

Almost surely, 2^2147043540 is an apocalyptic number.

2147043540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2147043540 is an abundant number, since it is smaller than the sum of its proper divisors (3864678540).

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

2147043540 is a wasteful number, since it uses less digits than its factorization.

2147043540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35784071 (or 35784069 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 2147043540 is about 46336.2011822290. The cubic root of 2147043540 is about 1290.0710134574.

The spelling of 2147043540 in words is "two billion, one hundred forty-seven million, forty-three thousand, five hundred forty".