2165946051 has 16 divisors (see below), whose sum is σ = 2935778688. Its totient is φ = 1420108800.

The previous prime is 2165946043. The next prime is 2165946067. The reversal of 2165946051 is 1506495612.

It is not a de Polignac number, because 2165946051 - 2³ = 2165946043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2165946031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120436 + ... + 137246.

It is an arithmetic number, because the mean of its divisors is an integer number (183486168).

Almost surely, 2^2165946051 is an apocalyptic number.

2165946051 is a deficient number, since it is larger than the sum of its proper divisors (769832637).

2165946051 is a wasteful number, since it uses less digits than its factorization.

2165946051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17522.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 2165946051 is about 46539.7255148760. The cubic root of 2165946051 is about 1293.8458734338.

The spelling of 2165946051 in words is "two billion, one hundred sixty-five million, nine hundred forty-six thousand, fifty-one".