2130400043 has 4 divisors (see below), whose sum is σ = 2133633480. Its totient is φ = 2127166608.

The previous prime is 2130400009. The next prime is 2130400081. The reversal of 2130400043 is 3400040312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2130400043 - 2⁶ = 2130399979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2130399994 and 2130400030.

It is not an unprimeable number, because it can be changed into a prime (2130400843) 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, 1615730 + ... + 1617047.

It is an arithmetic number, because the mean of its divisors is an integer number (533408370).

Almost surely, 2^2130400043 is an apocalyptic number.

2130400043 is a deficient number, since it is larger than the sum of its proper divisors (3233437).

2130400043 is an equidigital number, since it uses as much as digits as its factorization.

2130400043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233436.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 2130400043 is about 46156.2568131342. The cubic root of 2130400043 is about 1286.7288962075.

Adding to 2130400043 its reverse (3400040312), we get a palindrome (5530440355).

The spelling of 2130400043 in words is "two billion, one hundred thirty million, four hundred thousand, forty-three".