2155064109 has 16 divisors (see below), whose sum is σ = 3319030080. Its totient is φ = 1229269760.

The previous prime is 2155064077. The next prime is 2155064117. The reversal of 2155064109 is 9014605512.

It is a cyclic number.

It is not a de Polignac number, because 2155064109 - 2⁵ = 2155064077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 2155064109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155074109) 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, 1920174 + ... + 1921295.

It is an arithmetic number, because the mean of its divisors is an integer number (207439380).

Almost surely, 2^2155064109 is an apocalyptic number.

It is an amenable number.

2155064109 is a deficient number, since it is larger than the sum of its proper divisors (1163965971).

2155064109 is a wasteful number, since it uses less digits than its factorization.

2155064109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841500.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 2155064109 is about 46422.6680512872. The cubic root of 2155064109 is about 1291.6754283545.

The spelling of 2155064109 in words is "two billion, one hundred fifty-five million, sixty-four thousand, one hundred nine".