2189131566 has 32 divisors (see below), whose sum is σ = 4503778848. Its totient is φ = 708854400.

The previous prime is 2189131561. The next prime is 2189131597. The reversal of 2189131566 is 6651319812.

It is a super-2 number, since 2×2189131566² = 9584594026515224712, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189131561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137416 + ... + 152516.

It is an arithmetic number, because the mean of its divisors is an integer number (140743089).

Almost surely, 2^2189131566 is an apocalyptic number.

2189131566 is an abundant number, since it is smaller than the sum of its proper divisors (2314647282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2189131566 is a wasteful number, since it uses less digits than its factorization.

2189131566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15796.

The product of its digits is 77760, while the sum is 42.

The square root of 2189131566 is about 46788.1562577539. The cubic root of 2189131566 is about 1298.4461841837.

The spelling of 2189131566 in words is "two billion, one hundred eighty-nine million, one hundred thirty-one thousand, five hundred sixty-six".