2143112500 has 36 divisors (see below), whose sum is σ = 4687785900. Its totient is φ = 857240000.

The previous prime is 2143112459. The next prime is 2143112527. The reversal of 2143112500 is 52113412.

It can be written as a sum of positive squares in 6 ways, for example, as 1534602276 + 608510224 = 39174^2 + 24668^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73225 + ... + 98224.

It is an arithmetic number, because the mean of its divisors is an integer number (130216275).

Almost surely, 2^2143112500 is an apocalyptic number.

2143112500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143112500 is an abundant number, since it is smaller than the sum of its proper divisors (2544673400).

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

2143112500 is an equidigital number, since it uses as much as digits as its factorization.

2143112500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171478 (or 171456 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2143112500 is about 46293.7630788425. The cubic root of 2143112500 is about 1289.2831985148.

Adding to 2143112500 its reverse (52113412), we get a palindrome (2195225912).

It can be divided in two parts, 214311 and 2500, that added together give a triangular number (216811 = T₆₅₈).

The spelling of 2143112500 in words is "two billion, one hundred forty-three million, one hundred twelve thousand, five hundred".