2081291006 has 4 divisors (see below), whose sum is σ = 3121936512. Its totient is φ = 1040645502.

The previous prime is 2081290997. The next prime is 2081291039. The reversal of 2081291006 is 6001921802.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2081291006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520322750 + ... + 520322753.

It is an arithmetic number, because the mean of its divisors is an integer number (780484128).

Almost surely, 2^2081291006 is an apocalyptic number.

2081291006 is a deficient number, since it is larger than the sum of its proper divisors (1040645506).

2081291006 is a wasteful number, since it uses less digits than its factorization.

2081291006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040645505.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 2081291006 is about 45621.1683980145. The cubic root of 2081291006 is about 1276.7649029506.

The spelling of 2081291006 in words is "two billion, eighty-one million, two hundred ninety-one thousand, six".