2131668605 has 32 divisors (see below), whose sum is σ = 2895782400. Its totient is φ = 1492715520.

The previous prime is 2131668569. The next prime is 2131668629. The reversal of 2131668605 is 5068661312.

It is a de Polignac number, because none of the positive numbers 2^k-2131668605 is a prime.

It is a super-2 number, since 2×2131668605² = 9088022083085292050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191996 + ... + 202794.

It is an arithmetic number, because the mean of its divisors is an integer number (90493200).

Almost surely, 2^2131668605 is an apocalyptic number.

It is an amenable number.

2131668605 is a deficient number, since it is larger than the sum of its proper divisors (764113795).

2131668605 is a wasteful number, since it uses less digits than its factorization.

2131668605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10949.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 2131668605 is about 46169.9968052847. The cubic root of 2131668605 is about 1286.9842428512.

The spelling of 2131668605 in words is "two billion, one hundred thirty-one million, six hundred sixty-eight thousand, six hundred five".