2144521157 has 2 divisors, whose sum is σ = 2144521158. Its totient is φ = 2144521156.

The previous prime is 2144521129. The next prime is 2144521163. The reversal of 2144521157 is 7511254412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1261599361 + 882921796 = 35519^2 + 29714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2144521157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2144529157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072260578 + 1072260579.

It is an arithmetic number, because the mean of its divisors is an integer number (1072260579).

Almost surely, 2^2144521157 is an apocalyptic number.

It is an amenable number.

2144521157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2144521157 is an equidigital number, since it uses as much as digits as its factorization.

2144521157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11200, while the sum is 32.

The square root of 2144521157 is about 46308.9749076785. The cubic root of 2144521157 is about 1289.5656164203.

Adding to 2144521157 its reverse (7511254412), we get a palindrome (9655775569).

The spelling of 2144521157 in words is "two billion, one hundred forty-four million, five hundred twenty-one thousand, one hundred fifty-seven".