2100958513 has 2 divisors, whose sum is σ = 2100958514. Its totient is φ = 2100958512.

The previous prime is 2100958507. The next prime is 2100958571. The reversal of 2100958513 is 3158590012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1258333729 + 842624784 = 35473^2 + 29028^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100958513 - 2²⁵ = 2067404081 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100958313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050479256 + 1050479257.

It is an arithmetic number, because the mean of its divisors is an integer number (1050479257).

Almost surely, 2^2100958513 is an apocalyptic number.

It is an amenable number.

2100958513 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100958513 is an equidigital number, since it uses as much as digits as its factorization.

2100958513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 2100958513 is about 45836.2139906864. The cubic root of 2100958513 is about 1280.7739689675.

The spelling of 2100958513 in words is "two billion, one hundred million, nine hundred fifty-eight thousand, five hundred thirteen".