2161974151 has 8 divisors (see below), whose sum is σ = 2177441280. Its totient is φ = 2146537368.

The previous prime is 2161974137. The next prime is 2161974161. The reversal of 2161974151 is 1514791612.

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 2161974151 - 2¹³ = 2161965959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2161974151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161974161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146430 + ... + 160516.

It is an arithmetic number, because the mean of its divisors is an integer number (272180160).

Almost surely, 2^2161974151 is an apocalyptic number.

2161974151 is a deficient number, since it is larger than the sum of its proper divisors (15467129).

2161974151 is a wasteful number, since it uses less digits than its factorization.

2161974151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15173.

The product of its digits is 15120, while the sum is 37.

The square root of 2161974151 is about 46497.0337871138. The cubic root of 2161974151 is about 1293.0545070110.

The spelling of 2161974151 in words is "two billion, one hundred sixty-one million, nine hundred seventy-four thousand, one hundred fifty-one".