2171388090 has 32 divisors (see below), whose sum is σ = 5218009920. Its totient is φ = 578294784.

The previous prime is 2171388047. The next prime is 2171388103. The reversal of 2171388090 is 908831712.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22375 + ... + 69594.

It is an arithmetic number, because the mean of its divisors is an integer number (163062810).

Almost surely, 2^2171388090 is an apocalyptic number.

2171388090 is an abundant number, since it is smaller than the sum of its proper divisors (3046621830).

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

2171388090 is a wasteful number, since it uses less digits than its factorization.

2171388090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92766.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 2171388090 is about 46598.1554355964. The cubic root of 2171388090 is about 1294.9285828944.

The spelling of 2171388090 in words is "two billion, one hundred seventy-one million, three hundred eighty-eight thousand, ninety".