2145143144251 has 4 divisors (see below), whose sum is σ = 2145187365192. Its totient is φ = 2145098923312.

The previous prime is 2145143144239. The next prime is 2145143144299. The reversal of 2145143144251 is 1524413415412.

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 2145143144251 - 2²¹ = 2145141047099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2145143144251.

It is not an unprimeable number, because it can be changed into a prime (2145143144201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22037626 + ... + 22134751.

It is an arithmetic number, because the mean of its divisors is an integer number (536296841298).

Almost surely, 2^{2145143144251} is an apocalyptic number.

2145143144251 is a deficient number, since it is larger than the sum of its proper divisors (44220941).

2145143144251 is an equidigital number, since it uses as much as digits as its factorization.

2145143144251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44220940.

The product of its digits is 76800, while the sum is 37.

Adding to 2145143144251 its reverse (1524413415412), we get a palindrome (3669556559663).

The spelling of 2145143144251 in words is "two trillion, one hundred forty-five billion, one hundred forty-three million, one hundred forty-four thousand, two hundred fifty-one".