52221081 has 16 divisors (see below), whose sum is σ = 78409728. Its totient is φ = 30627600.

The previous prime is 52221079. The next prime is 52221149. The reversal of 52221081 is 18012225.

It is a happy number.

52221081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 52221081 - 2¹ = 52221079 is a prime.

It is a super-2 number, since 2×52221081² = 5454082601617122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52221011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24501 + ... + 26546.

It is an arithmetic number, because the mean of its divisors is an integer number (4900608).

Almost surely, 2^52221081 is an apocalyptic number.

It is an amenable number.

52221081 is a deficient number, since it is larger than the sum of its proper divisors (26188647).

52221081 is a wasteful number, since it uses less digits than its factorization.

52221081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51092.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 52221081 is about 7226.4155014779. The cubic root of 52221081 is about 373.7793340212.

Subtracting from 52221081 its reverse (18012225), we obtain a triangular number (34208856 = T₈₂₇₁).

The spelling of 52221081 in words is "fifty-two million, two hundred twenty-one thousand, eighty-one".