52421881 has 4 divisors (see below), whose sum is σ = 52503552. Its totient is φ = 52340212.

The previous prime is 52421869. The next prime is 52421891. The reversal of 52421881 is 18812425.

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 52421881 - 2¹⁷ = 52290809 is a prime.

It is a super-2 number, since 2×52421881² = 5496107215156322, 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 (52421851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39865 + ... + 41158.

It is an arithmetic number, because the mean of its divisors is an integer number (13125888).

Almost surely, 2^52421881 is an apocalyptic number.

It is an amenable number.

52421881 is a deficient number, since it is larger than the sum of its proper divisors (81671).

52421881 is an equidigital number, since it uses as much as digits as its factorization.

52421881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81670.

The product of its digits is 5120, while the sum is 31.

The square root of 52421881 is about 7240.2956431350. The cubic root of 52421881 is about 374.2578055102.

The spelling of 52421881 in words is "fifty-two million, four hundred twenty-one thousand, eight hundred eighty-one".