2165355967 has 2 divisors, whose sum is σ = 2165355968. Its totient is φ = 2165355966.

The previous prime is 2165355949. The next prime is 2165356007. The reversal of 2165355967 is 7695535612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2165355967 - 2¹⁹ = 2164831679 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2165355967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2165355917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082677983 + 1082677984.

It is an arithmetic number, because the mean of its divisors is an integer number (1082677984).

Almost surely, 2^2165355967 is an apocalyptic number.

2165355967 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165355967 is an equidigital number, since it uses as much as digits as its factorization.

2165355967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1701000, while the sum is 49.

The square root of 2165355967 is about 46533.3855097606. The cubic root of 2165355967 is about 1293.7283655682.

The spelling of 2165355967 in words is "two billion, one hundred sixty-five million, three hundred fifty-five thousand, nine hundred sixty-seven".