2161671427 has 8 divisors (see below), whose sum is σ = 2201698800. Its totient is φ = 2121993984.

The previous prime is 2161671383. The next prime is 2161671443. The reversal of 2161671427 is 7241761612.

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

It is a cyclic number.

It is not a de Polignac number, because 2161671427 - 2¹¹ = 2161669379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161071427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74998 + ... + 99739.

It is an arithmetic number, because the mean of its divisors is an integer number (275212350).

Almost surely, 2^2161671427 is an apocalyptic number.

2161671427 is a deficient number, since it is larger than the sum of its proper divisors (40027373).

2161671427 is a wasteful number, since it uses less digits than its factorization.

2161671427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174965.

The product of its digits is 28224, while the sum is 37.

The square root of 2161671427 is about 46493.7783687237. The cubic root of 2161671427 is about 1292.9941521568.

The spelling of 2161671427 in words is "two billion, one hundred sixty-one million, six hundred seventy-one thousand, four hundred twenty-seven".