2157052171 has 8 divisors (see below), whose sum is σ = 2287737504. Its totient is φ = 2029441920.

The previous prime is 2157052151. The next prime is 2157052193. The reversal of 2157052171 is 1712507512.

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 2157052171 - 2¹¹ = 2157050123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2157052111) 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, 767326 + ... + 770131.

It is an arithmetic number, because the mean of its divisors is an integer number (285967188).

Almost surely, 2^2157052171 is an apocalyptic number.

2157052171 is a deficient number, since it is larger than the sum of its proper divisors (130685333).

2157052171 is a wasteful number, since it uses less digits than its factorization.

2157052171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537541.

The product of its (nonzero) digits is 4900, while the sum is 31.

The square root of 2157052171 is about 46444.0757363089. The cubic root of 2157052171 is about 1292.0724995420.

Adding to 2157052171 its reverse (1712507512), we get a palindrome (3869559683).

The spelling of 2157052171 in words is "two billion, one hundred fifty-seven million, fifty-two thousand, one hundred seventy-one".