2144538557 has 16 divisors (see below), whose sum is σ = 2510534400. Its totient is φ = 1831109616.

The previous prime is 2144538551. The next prime is 2144538577. The reversal of 2144538557 is 7558354412.

It is not a de Polignac number, because 2144538557 - 2¹⁴ = 2144522173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144538551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78323 + ... + 102095.

It is an arithmetic number, because the mean of its divisors is an integer number (156908400).

Almost surely, 2^2144538557 is an apocalyptic number.

It is an amenable number.

2144538557 is a deficient number, since it is larger than the sum of its proper divisors (365995843).

2144538557 is an equidigital number, since it uses as much as digits as its factorization.

2144538557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24057 (or 24043 counting only the distinct ones).

The product of its digits is 672000, while the sum is 44.

The square root of 2144538557 is about 46309.1627758482. The cubic root of 2144538557 is about 1289.5691041268.

The spelling of 2144538557 in words is "two billion, one hundred forty-four million, five hundred thirty-eight thousand, five hundred fifty-seven".