2145205143499 has 4 divisors (see below), whose sum is σ = 2340223792920. Its totient is φ = 1950186494080.

The previous prime is 2145205143461. The next prime is 2145205143533. The reversal of 2145205143499 is 9943415025412.

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

It is not a de Polignac number, because 2145205143499 - 2⁹ = 2145205142987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145205143439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97509324694 + ... + 97509324715.

It is an arithmetic number, because the mean of its divisors is an integer number (585055948230).

Almost surely, 2^{2145205143499} is an apocalyptic number.

2145205143499 is a deficient number, since it is larger than the sum of its proper divisors (195018649421).

2145205143499 is a wasteful number, since it uses less digits than its factorization.

2145205143499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195018649420.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 2145205143499 in words is "two trillion, one hundred forty-five billion, two hundred five million, one hundred forty-three thousand, four hundred ninety-nine".