2002155706 has 16 divisors (see below), whose sum is σ = 3078610920. Its totient is φ = 975985920.

The previous prime is 2002155691. The next prime is 2002155713. The reversal of 2002155706 is 6075512002.

It can be written as a sum of positive squares in 4 ways, for example, as 1027779481 + 974376225 = 32059^2 + 31215^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123310 + ... + 138598.

Almost surely, 2^2002155706 is an apocalyptic number.

2002155706 is a deficient number, since it is larger than the sum of its proper divisors (1076455214).

2002155706 is a wasteful number, since it uses less digits than its factorization.

2002155706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16929.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 2002155706 is about 44745.4545847955. The cubic root of 2002155706 is about 1260.3735572495.

Adding to 2002155706 its reverse (6075512002), we get a palindrome (8077667708).

The spelling of 2002155706 in words is "two billion, two million, one hundred fifty-five thousand, seven hundred six".