2175421133 has 4 divisors (see below), whose sum is σ = 2303387100. Its totient is φ = 2047455168.

The previous prime is 2175421117. The next prime is 2175421139. The reversal of 2175421133 is 3311245712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 595994569 + 1579426564 = 24413^2 + 39742^2 .

It is a cyclic number.

It is not a de Polignac number, because 2175421133 - 2⁴ = 2175421117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2175421096 and 2175421105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2175421139) 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, 63982958 + ... + 63982991.

It is an arithmetic number, because the mean of its divisors is an integer number (575846775).

Almost surely, 2^2175421133 is an apocalyptic number.

It is an amenable number.

2175421133 is a deficient number, since it is larger than the sum of its proper divisors (127965967).

2175421133 is a wasteful number, since it uses less digits than its factorization.

2175421133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127965966.

The product of its digits is 5040, while the sum is 29.

The square root of 2175421133 is about 46641.4100665921. The cubic root of 2175421133 is about 1295.7298019644.

Adding to 2175421133 its reverse (3311245712), we get a palindrome (5486666845).

The spelling of 2175421133 in words is "two billion, one hundred seventy-five million, four hundred twenty-one thousand, one hundred thirty-three".