52171138 has 4 divisors (see below), whose sum is σ = 78256710. Its totient is φ = 26085568.

The previous prime is 52171123. The next prime is 52171151. The reversal of 52171138 is 83117125.

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

It can be written as a sum of positive squares in only one way, i.e., 46280809 + 5890329 = 6803^2 + 2427^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13042783 + ... + 13042786.

Almost surely, 2^52171138 is an apocalyptic number.

52171138 is a deficient number, since it is larger than the sum of its proper divisors (26085572).

52171138 is a wasteful number, since it uses less digits than its factorization.

52171138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26085571.

The product of its digits is 1680, while the sum is 28.

The square root of 52171138 is about 7222.9590889053. The cubic root of 52171138 is about 373.6601381257.

The spelling of 52171138 in words is "fifty-two million, one hundred seventy-one thousand, one hundred thirty-eight".