2101582090 has 8 divisors (see below), whose sum is σ = 3782847780. Its totient is φ = 840632832.

The previous prime is 2101582081. The next prime is 2101582097. The reversal of 2101582090 is 902851012.

It can be written as a sum of positive squares in 2 ways, for example, as 2098647721 + 2934369 = 45811^2 + 1713^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2101582097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105079095 + ... + 105079114.

Almost surely, 2^2101582090 is an apocalyptic number.

2101582090 is a deficient number, since it is larger than the sum of its proper divisors (1681265690).

2101582090 is a wasteful number, since it uses less digits than its factorization.

2101582090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210158216.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 2101582090 is about 45843.0157166825. The cubic root of 2101582090 is about 1280.9006702139.

The spelling of 2101582090 in words is "two billion, one hundred one million, five hundred eighty-two thousand, ninety".