2106015817 has 2 divisors, whose sum is σ = 2106015818. Its totient is φ = 2106015816.

The previous prime is 2106015787. The next prime is 2106015823. The reversal of 2106015817 is 7185106012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1098524736 + 1007491081 = 33144^2 + 31741^2 .

It is a cyclic number.

It is not a de Polignac number, because 2106015817 - 2¹⁵ = 2105983049 is a prime.

It is not a weakly prime, because it can be changed into another prime (2106015017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053007908 + 1053007909.

It is an arithmetic number, because the mean of its divisors is an integer number (1053007909).

Almost surely, 2^2106015817 is an apocalyptic number.

It is an amenable number.

2106015817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106015817 is an equidigital number, since it uses as much as digits as its factorization.

2106015817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 2106015817 is about 45891.3479536176. The cubic root of 2106015817 is about 1281.8008134587.

The spelling of 2106015817 in words is "two billion, one hundred six million, fifteen thousand, eight hundred seventeen".