2144640521 has 2 divisors, whose sum is σ = 2144640522. Its totient is φ = 2144640520.

The previous prime is 2144640479. The next prime is 2144640527. The reversal of 2144640521 is 1250464412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1549524496 + 595116025 = 39364^2 + 24395^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144640521 - 2²⁶ = 2077531657 is a prime.

It is not a weakly prime, because it can be changed into another prime (2144640527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072320260 + 1072320261.

It is an arithmetic number, because the mean of its divisors is an integer number (1072320261).

Almost surely, 2^2144640521 is an apocalyptic number.

It is an amenable number.

2144640521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2144640521 is an equidigital number, since it uses as much as digits as its factorization.

2144640521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 2144640521 is about 46310.2636680034. The cubic root of 2144640521 is about 1289.5895417076.

The spelling of 2144640521 in words is "two billion, one hundred forty-four million, six hundred forty thousand, five hundred twenty-one".