5154809209 has 27 divisors (see below), whose sum is σ = 5814777423. Its totient is φ = 4566289200.

The previous prime is 5154809201. The next prime is 5154809213. The reversal of 5154809209 is 9029084515.

The square root of 5154809209 is 71797.

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

It can be written as a sum of positive squares in only one way, i.e., 167624809 + 4987184400 = 12947^2 + 70620^2 .

It is not a de Polignac number, because 5154809209 - 2³ = 5154809201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5154809201) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 48175734 + ... + 48175840.

Almost surely, 2^5154809209 is an apocalyptic number.

5154809209 is the 71797-th square number.

5154809209 is the 35899-th centered octagonal number.

It is an amenable number.

5154809209 is a deficient number, since it is larger than the sum of its proper divisors (659968214).

5154809209 is an equidigital number, since it uses as much as digits as its factorization.

5154809209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 43.

The cubic root of 5154809209 is about 1727.4448797758. Note that the first 3 decimals are identical.

Multiplying 5154809209 by its product of nonzero digits (129600), we get a square (668063273486400 = 25846920²).

The spelling of 5154809209 in words is "five billion, one hundred fifty-four million, eight hundred nine thousand, two hundred nine".