52043981 has 4 divisors (see below), whose sum is σ = 56775264. Its totient is φ = 47312700.

The previous prime is 52043977. The next prime is 52044001. The reversal of 52043981 is 18934025.

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 52043981 - 2² = 52043977 is a prime.

It is a super-2 number, since 2×52043981² = 5417151916656722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52043911) 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, 2365625 + ... + 2365646.

It is an arithmetic number, because the mean of its divisors is an integer number (14193816).

Almost surely, 2^52043981 is an apocalyptic number.

It is an amenable number.

52043981 is a deficient number, since it is larger than the sum of its proper divisors (4731283).

52043981 is a wasteful number, since it uses less digits than its factorization.

52043981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4731282.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 52043981 is about 7214.1514400517. The cubic root of 52043981 is about 373.3563165237.

The spelling of 52043981 in words is "fifty-two million, forty-three thousand, nine hundred eighty-one".