52471681 has 4 divisors (see below), whose sum is σ = 52502832. Its totient is φ = 52440532.

The previous prime is 52471669. The next prime is 52471753. The reversal of 52471681 is 18617425.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52471681 - 2⁵ = 52471649 is a prime.

It is a super-2 number, since 2×52471681² = 5506554613931522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52471631) 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, 12895 + ... + 16468.

It is an arithmetic number, because the mean of its divisors is an integer number (13125708).

Almost surely, 2^52471681 is an apocalyptic number.

It is an amenable number.

52471681 is a deficient number, since it is larger than the sum of its proper divisors (31151).

52471681 is a wasteful number, since it uses less digits than its factorization.

52471681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31150.

The product of its digits is 13440, while the sum is 34.

The square root of 52471681 is about 7243.7339128380. The cubic root of 52471681 is about 374.3762811004.

The spelling of 52471681 in words is "fifty-two million, four hundred seventy-one thousand, six hundred eighty-one".