2154179259 has 64 divisors (see below), whose sum is σ = 3440102400. Its totient is φ = 1327532544.

The previous prime is 2154179233. The next prime is 2154179273. The reversal of 2154179259 is 9529714512.

It is not a de Polignac number, because 2154179259 - 2¹¹ = 2154177211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2154179459) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12034432 + ... + 12034610.

It is an arithmetic number, because the mean of its divisors is an integer number (53751600).

Almost surely, 2^2154179259 is an apocalyptic number.

2154179259 is a deficient number, since it is larger than the sum of its proper divisors (1285923141).

2154179259 is a wasteful number, since it uses less digits than its factorization.

2154179259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 523 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 2154179259 is about 46413.1367071867. The cubic root of 2154179259 is about 1291.4986207040.

It can be divided in two parts, 215417 and 9259, that added together give a square (224676 = 474²).

The spelling of 2154179259 in words is "two billion, one hundred fifty-four million, one hundred seventy-nine thousand, two hundred fifty-nine".