52171657 has 4 divisors (see below), whose sum is σ = 55240596. Its totient is φ = 49102720.

The previous prime is 52171643. The next prime is 52171673. The reversal of 52171657 is 75617125.

It is a happy number.

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 45010681 + 7160976 = 6709^2 + 2676^2 .

It is a cyclic number.

It is not a de Polignac number, because 52171657 - 2⁷ = 52171529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52171607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1534444 + ... + 1534477.

It is an arithmetic number, because the mean of its divisors is an integer number (13810149).

Almost surely, 2^52171657 is an apocalyptic number.

It is an amenable number.

52171657 is a deficient number, since it is larger than the sum of its proper divisors (3068939).

52171657 is a wasteful number, since it uses less digits than its factorization.

52171657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068938.

The product of its digits is 14700, while the sum is 34.

The square root of 52171657 is about 7222.9950159196. The cubic root of 52171657 is about 373.6613771823.

The spelling of 52171657 in words is "fifty-two million, one hundred seventy-one thousand, six hundred fifty-seven".