52381481 has 4 divisors (see below), whose sum is σ = 52445952. Its totient is φ = 52317012.

The previous prime is 52381421. The next prime is 52381487. The reversal of 52381481 is 18418325.

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 52381481 - 2¹⁰ = 52380457 is a prime.

It is a super-2 number, since 2×52381481² = 5487639103506722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52381487) 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, 31001 + ... + 32646.

It is an arithmetic number, because the mean of its divisors is an integer number (13111488).

Almost surely, 2^52381481 is an apocalyptic number.

It is an amenable number.

52381481 is a deficient number, since it is larger than the sum of its proper divisors (64471).

52381481 is an equidigital number, since it uses as much as digits as its factorization.

52381481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64470.

The product of its digits is 7680, while the sum is 32.

The square root of 52381481 is about 7237.5051640742. The cubic root of 52381481 is about 374.1616376447.

The spelling of 52381481 in words is "fifty-two million, three hundred eighty-one thousand, four hundred eighty-one".