2179565032225 has 27 divisors (see below), whose sum is σ = 3143985892281. Its totient is φ = 1494523447200.

The previous prime is 2179565032223. The next prime is 2179565032289. The reversal of 2179565032225 is 5222305659712.

The square root of 2179565032225 is 1476335.

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 963379547361 + 1216185484864 = 981519^2 + 1102808^2 .

It is not a de Polignac number, because 2179565032225 - 2¹ = 2179565032223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2179565032223) 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, 51650635 + ... + 51692815.

Almost surely, 2^{2179565032225} is an apocalyptic number.

2179565032225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2179565032225 is the 1476335-th square number.

2179565032225 is the 738168-th centered octagonal number.

It is an amenable number.

2179565032225 is a deficient number, since it is larger than the sum of its proper divisors (964420860056).

2179565032225 is an frugal number, since it uses more digits than its factorization.

2179565032225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84386 (or 42193 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 49.

Multiplying 2179565032225 by its sum of digits (49), we get a square (106798686579025 = 10334345²).

2179565032225 divided by its sum of digits (49) gives a square (44480919025 = 210905²).

The spelling of 2179565032225 in words is "two trillion, one hundred seventy-nine billion, five hundred sixty-five million, thirty-two thousand, two hundred twenty-five".