2155032009 has 24 divisors (see below), whose sum is σ = 3353837760. Its totient is φ = 1325554272.

The previous prime is 2155032007. The next prime is 2155032067. The reversal of 2155032009 is 9002305512.

It is not a de Polignac number, because 2155032009 - 2¹ = 2155032007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2155032007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 467932 + ... + 472514.

It is an arithmetic number, because the mean of its divisors is an integer number (139743240).

Almost surely, 2^2155032009 is an apocalyptic number.

It is an amenable number.

2155032009 is a deficient number, since it is larger than the sum of its proper divisors (1198805751).

2155032009 is a wasteful number, since it uses less digits than its factorization.

2155032009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8621 (or 8618 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 2155032009 is about 46422.3223137318. The cubic root of 2155032009 is about 1291.6690150902.

The spelling of 2155032009 in words is "two billion, one hundred fifty-five million, thirty-two thousand, nine".