2189772025 has 45 divisors (see below), whose sum is σ = 3184353263. Its totient is φ = 1493696400.

The previous prime is 2189772001. The next prime is 2189772029. The reversal of 2189772025 is 5202779812.

The square root of 2189772025 is 46795.

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., 788317929 + 1401454096 = 28077^2 + 37436^2 .

It is not a de Polignac number, because 2189772025 - 2¹⁵ = 2189739257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2189772029) 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 44 ways as a sum of consecutive naturals, for example, 11464680 + ... + 11464870.

Almost surely, 2^2189772025 is an apocalyptic number.

2189772025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2189772025 is the 46795-th square number.

2189772025 is the 23398-th centered octagonal number.

It is an amenable number.

2189772025 is a deficient number, since it is larger than the sum of its proper divisors (994581238).

2189772025 is an frugal number, since it uses more digits than its factorization.

2189772025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 43.

The cubic root of 2189772025 is about 1298.5727976275.

The spelling of 2189772025 in words is "two billion, one hundred eighty-nine million, seven hundred seventy-two thousand, twenty-five".