2142105517 has 2 divisors, whose sum is σ = 2142105518. Its totient is φ = 2142105516.

The previous prime is 2142105481. The next prime is 2142105521. The reversal of 2142105517 is 7155012412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1509633316 + 632472201 = 38854^2 + 25149^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142105517 - 2²³ = 2133716909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2142102517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071052758 + 1071052759.

It is an arithmetic number, because the mean of its divisors is an integer number (1071052759).

Almost surely, 2^2142105517 is an apocalyptic number.

It is an amenable number.

2142105517 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142105517 is an equidigital number, since it uses as much as digits as its factorization.

2142105517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 2142105517 is about 46282.8857894579. The cubic root of 2142105517 is about 1289.0812353020.

Adding to 2142105517 its reverse (7155012412), we get a palindrome (9297117929).

The spelling of 2142105517 in words is "two billion, one hundred forty-two million, one hundred five thousand, five hundred seventeen".