2150981806 has 8 divisors (see below), whose sum is σ = 3226714920. Its totient is φ = 1075410168.

The previous prime is 2150981801. The next prime is 2150981809. The reversal of 2150981806 is 6081890512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2150981801) 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, 1705 + ... + 65611.

It is an arithmetic number, because the mean of its divisors is an integer number (403339365).

Almost surely, 2^2150981806 is an apocalyptic number.

2150981806 is a deficient number, since it is larger than the sum of its proper divisors (1075733114).

2150981806 is a wasteful number, since it uses less digits than its factorization.

2150981806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80738.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 2150981806 is about 46378.6783554685. The cubic root of 2150981806 is about 1290.8593128789.

The spelling of 2150981806 in words is "two billion, one hundred fifty million, nine hundred eighty-one thousand, eight hundred six".