2154401155 has 16 divisors (see below), whose sum is σ = 2690866080. Its totient is φ = 1653861888.

The previous prime is 2154401113. The next prime is 2154401261. The reversal of 2154401155 is 5511044512.

It is a cyclic number.

It is not a de Polignac number, because 2154401155 - 2⁷ = 2154401027 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21942 + ... + 69211.

It is an arithmetic number, because the mean of its divisors is an integer number (168179130).

Almost surely, 2^2154401155 is an apocalyptic number.

2154401155 is a deficient number, since it is larger than the sum of its proper divisors (536464925).

2154401155 is a wasteful number, since it uses less digits than its factorization.

2154401155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91350.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 2154401155 is about 46415.5270895419. The cubic root of 2154401155 is about 1291.5429637390.

Adding to 2154401155 its reverse (5511044512), we get a palindrome (7665445667).

The spelling of 2154401155 in words is "two billion, one hundred fifty-four million, four hundred one thousand, one hundred fifty-five".