2155432505211 has 12 divisors (see below), whose sum is σ = 3114929460240. Its totient is φ = 1436250256080.

The previous prime is 2155432505209. The next prime is 2155432505251. The reversal of 2155432505211 is 1125052345512.

2155432505211 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 432 + 5 + 0 + 5 + 211 = 666.

It is not a de Polignac number, because 2155432505211 - 2¹ = 2155432505209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2155432505251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58709580 + ... + 58746281.

It is an arithmetic number, because the mean of its divisors is an integer number (259577455020).

Almost surely, 2^{2155432505211} is an apocalyptic number.

2155432505211 is a deficient number, since it is larger than the sum of its proper divisors (959496955029).

2155432505211 is a wasteful number, since it uses less digits than its factorization.

2155432505211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117457906 (or 117457903 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 2155432505211 in words is "two trillion, one hundred fifty-five billion, four hundred thirty-two million, five hundred five thousand, two hundred eleven".