2154909241 has 9 divisors (see below), whose sum is σ = 2193697389. Its totient is φ = 2116797600.

The previous prime is 2154909233. The next prime is 2154909311. The reversal of 2154909241 is 1429094512.

The square root of 2154909241 is 46421.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2040419241 + 114490000 = 45171^2 + 10700^2 .

It is not a de Polignac number, because 2154909241 - 2³ = 2154909233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2154909241.

It is not an unprimeable number, because it can be changed into a prime (2154903241) 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 8 ways as a sum of consecutive naturals, for example, 2831301 + ... + 2832061.

Almost surely, 2^2154909241 is an apocalyptic number.

2154909241 is the 46421-st square number.

2154909241 is the 23211-st centered octagonal number.

It is an amenable number.

2154909241 is a deficient number, since it is larger than the sum of its proper divisors (38788148).

2154909241 is an frugal number, since it uses more digits than its factorization.

2154909241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The cubic root of 2154909241 is about 1291.6444866636.

The spelling of 2154909241 in words is "two billion, one hundred fifty-four million, nine hundred nine thousand, two hundred forty-one".