2052169421 has 6 divisors (see below), whose sum is σ = 2055227022. Its totient is φ = 2049115800.

The previous prime is 2052169417. The next prime is 2052169477. The reversal of 2052169421 is 1249612502.

It can be written as a sum of positive squares in only one way, i.e., 1322413225 + 729756196 = 36365^2 + 27014^2 .

It is not a de Polignac number, because 2052169421 - 2² = 2052169417 is a prime.

It is a super-2 number, since 2×2052169421² = 8422798664974950482, 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 (2052169121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1078571 + ... + 1080471.

It is an arithmetic number, because the mean of its divisors is an integer number (342537837).

Almost surely, 2^2052169421 is an apocalyptic number.

It is an amenable number.

2052169421 is a deficient number, since it is larger than the sum of its proper divisors (3057601).

2052169421 is an frugal number, since it uses more digits than its factorization.

2052169421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3979 (or 2940 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 2052169421 is about 45300.8766029974. The cubic root of 2052169421 is about 1270.7820469002.

The spelling of 2052169421 in words is "two billion, fifty-two million, one hundred sixty-nine thousand, four hundred twenty-one".