2052161999 has 4 divisors (see below), whose sum is σ = 2057179920. Its totient is φ = 2047144080.

The previous prime is 2052161957. The next prime is 2052162001. The reversal of 2052161999 is 9991612502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9991612502 = 2 ⋅4995806251.

It is a cyclic number.

It is not a de Polignac number, because 2052161999 - 2¹² = 2052157903 is a prime.

It is a super-2 number, since 2×2052161999² = 8422737740279352002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2052161099) 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, 2508347 + ... + 2509164.

It is an arithmetic number, because the mean of its divisors is an integer number (514294980).

Almost surely, 2^2052161999 is an apocalyptic number.

2052161999 is a deficient number, since it is larger than the sum of its proper divisors (5017921).

2052161999 is an equidigital number, since it uses as much as digits as its factorization.

2052161999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5017920.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 2052161999 is about 45300.7946839788. The cubic root of 2052161999 is about 1270.7805149026.

The spelling of 2052161999 in words is "two billion, fifty-two million, one hundred sixty-one thousand, nine hundred ninety-nine".