2154406555 has 16 divisors (see below), whose sum is σ = 2955836160. Its totient is φ = 1476696672.

The previous prime is 2154406519. The next prime is 2154406559. The reversal of 2154406555 is 5556044512.

It is a cyclic number.

It is not a de Polignac number, because 2154406555 - 2⁹ = 2154406043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2154406559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83376 + ... + 106114.

It is an arithmetic number, because the mean of its divisors is an integer number (184739760).

Almost surely, 2^2154406555 is an apocalyptic number.

2154406555 is a deficient number, since it is larger than the sum of its proper divisors (801429605).

2154406555 is a wasteful number, since it uses less digits than its factorization.

2154406555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25458.

The product of its (nonzero) digits is 120000, while the sum is 37.

The square root of 2154406555 is about 46415.5852596948. The cubic root of 2154406555 is about 1291.5440428209.

The spelling of 2154406555 in words is "two billion, one hundred fifty-four million, four hundred six thousand, five hundred fifty-five".