2189445525 has 96 divisors (see below), whose sum is σ = 4371148800. Its totient is φ = 1070366400.

The previous prime is 2189445397. The next prime is 2189445539. The reversal of 2189445525 is 5255449812.

2189445525 is a `hidden beast` number, since 2 + 1 + 8 + 94 + 4 + 552 + 5 = 666.

It is not a de Polignac number, because 2189445525 - 2⁷ = 2189445397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 394822 + ... + 400328.

It is an arithmetic number, because the mean of its divisors is an integer number (45532800).

Almost surely, 2^2189445525 is an apocalyptic number.

2189445525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2189445525 is a deficient number, since it is larger than the sum of its proper divisors (2181703275).

2189445525 is a wasteful number, since it uses less digits than its factorization.

2189445525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5576 (or 5565 counting only the distinct ones).

The product of its digits is 576000, while the sum is 45.

The square root of 2189445525 is about 46791.5112493709. The cubic root of 2189445525 is about 1298.5082543649.

The spelling of 2189445525 in words is "two billion, one hundred eighty-nine million, four hundred forty-five thousand, five hundred twenty-five".