52640871 has 4 divisors (see below), whose sum is σ = 70187832. Its totient is φ = 35093912.

The previous prime is 52640867. The next prime is 52640881. The reversal of 52640871 is 17804625.

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

It is a cyclic number.

It is not a de Polignac number, because 52640871 - 2² = 52640867 is a prime.

It is a super-2 number, since 2×52640871² = 5542122599277282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52640801) 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, 8773476 + ... + 8773481.

It is an arithmetic number, because the mean of its divisors is an integer number (17546958).

Almost surely, 2^52640871 is an apocalyptic number.

52640871 is a deficient number, since it is larger than the sum of its proper divisors (17546961).

52640871 is a wasteful number, since it uses less digits than its factorization.

52640871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17546960.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 52640871 is about 7255.4028833691. The cubic root of 52640871 is about 374.7782297626.

The spelling of 52640871 in words is "fifty-two million, six hundred forty thousand, eight hundred seventy-one".