2171390513 has 2 divisors, whose sum is σ = 2171390514. Its totient is φ = 2171390512.

The previous prime is 2171390503. The next prime is 2171390521. The reversal of 2171390513 is 3150931712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1898083489 + 273307024 = 43567^2 + 16532^2 .

It is a cyclic number.

It is not a de Polignac number, because 2171390513 - 2⁴ = 2171390497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2171390513.

It is not a weakly prime, because it can be changed into another prime (2171390503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085695256 + 1085695257.

It is an arithmetic number, because the mean of its divisors is an integer number (1085695257).

Almost surely, 2^2171390513 is an apocalyptic number.

It is an amenable number.

2171390513 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171390513 is an equidigital number, since it uses as much as digits as its factorization.

2171390513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 2171390513 is about 46598.1814344723. The cubic root of 2171390513 is about 1294.9290645541.

The spelling of 2171390513 in words is "two billion, one hundred seventy-one million, three hundred ninety thousand, five hundred thirteen".