2154554511 has 16 divisors (see below), whose sum is σ = 2972923008. Its totient is φ = 1386871200.

The previous prime is 2154554497. The next prime is 2154554539. The reversal of 2154554511 is 1154554512.

It is a happy number.

It is not a de Polignac number, because 2154554511 - 2⁶ = 2154554447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154554911) 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, 59545 + ... + 88626.

It is an arithmetic number, because the mean of its divisors is an integer number (185807688).

Almost surely, 2^2154554511 is an apocalyptic number.

2154554511 is a deficient number, since it is larger than the sum of its proper divisors (818368497).

2154554511 is a wasteful number, since it uses less digits than its factorization.

2154554511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148342.

The product of its digits is 20000, while the sum is 33.

The square root of 2154554511 is about 46417.1790504335. The cubic root of 2154554511 is about 1291.5736081654.

Subtracting from 2154554511 its reverse (1154554512), we obtain a palindrome (999999999).

The spelling of 2154554511 in words is "two billion, one hundred fifty-four million, five hundred fifty-four thousand, five hundred eleven".