2188531606 has 16 divisors (see below), whose sum is σ = 3473492400. Its totient is φ = 1031298048.

The previous prime is 2188531561. The next prime is 2188531643. The reversal of 2188531606 is 6061358812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141871 + ... + 156538.

It is an arithmetic number, because the mean of its divisors is an integer number (217093275).

Almost surely, 2^2188531606 is an apocalyptic number.

2188531606 is a deficient number, since it is larger than the sum of its proper divisors (1284960794).

2188531606 is a wasteful number, since it uses less digits than its factorization.

2188531606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298623.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 2188531606 is about 46781.7443667933. The cubic root of 2188531606 is about 1298.3275546532.

The spelling of 2188531606 in words is "two billion, one hundred eighty-eight million, five hundred thirty-one thousand, six hundred six".