2144521457 has 16 divisors (see below), whose sum is σ = 2491488720. Its totient is φ = 1827950592.

The previous prime is 2144521447. The next prime is 2144521459. The reversal of 2144521457 is 7541254412.

It can be written as a sum of positive squares in 8 ways, for example, as 13868176 + 2130653281 = 3724^2 + 46159^2 .

It is not a de Polignac number, because 2144521457 - 2²² = 2140327153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2144521459) 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, 79832 + ... + 103257.

It is an arithmetic number, because the mean of its divisors is an integer number (155718045).

Almost surely, 2^2144521457 is an apocalyptic number.

It is an amenable number.

2144521457 is a deficient number, since it is larger than the sum of its proper divisors (346967263).

2144521457 is a wasteful number, since it uses less digits than its factorization.

2144521457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183172.

The product of its digits is 44800, while the sum is 35.

The square root of 2144521457 is about 46308.9781467914. The cubic root of 2144521457 is about 1289.5656765534.

Adding to 2144521457 its reverse (7541254412), we get a palindrome (9685775869).

The spelling of 2144521457 in words is "two billion, one hundred forty-four million, five hundred twenty-one thousand, four hundred fifty-seven".