2721187225 has 9 divisors (see below), whose sum is σ = 3374595613. Its totient is φ = 2176741120.

The previous prime is 2721187207. The next prime is 2721187241. The reversal of 2721187225 is 5227811272.

The square root of 2721187225 is 52165.

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 104329 + 2721082896 = 323^2 + 52164^2 .

It is not a de Polignac number, because 2721187225 - 2²⁹ = 2184316313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 255609 + ... + 266041.

Almost surely, 2^2721187225 is an apocalyptic number.

2721187225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2721187225 is the 52165-th square number.

2721187225 is the 26083-rd centered octagonal number.

It is an amenable number.

2721187225 is a deficient number, since it is larger than the sum of its proper divisors (653408388).

2721187225 is an frugal number, since it uses more digits than its factorization.

2721187225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20876 (or 10438 counting only the distinct ones).

The product of its digits is 31360, while the sum is 37.

The cubic root of 2721187225 is about 1396.1094748139.

Adding to 2721187225 its reverse (5227811272), we get a palindrome (7948998497).

The spelling of 2721187225 in words is "two billion, seven hundred twenty-one million, one hundred eighty-seven thousand, two hundred twenty-five".