52143691 has 4 divisors (see below), whose sum is σ = 54410832. Its totient is φ = 49876552.

The previous prime is 52143683. The next prime is 52143697. The reversal of 52143691 is 19634125.

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 52143691 - 2³ = 52143683 is a prime.

It is a super-2 number, since 2×52143691² = 5437929022206962, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52143697) 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, 1133536 + ... + 1133581.

It is an arithmetic number, because the mean of its divisors is an integer number (13602708).

Almost surely, 2^52143691 is an apocalyptic number.

52143691 is a deficient number, since it is larger than the sum of its proper divisors (2267141).

52143691 is a wasteful number, since it uses less digits than its factorization.

52143691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267140.

The product of its digits is 6480, while the sum is 31.

The square root of 52143691 is about 7221.0588558743. The cubic root of 52143691 is about 373.5945996610.

The spelling of 52143691 in words is "fifty-two million, one hundred forty-three thousand, six hundred ninety-one".