52061221 has 4 divisors (see below), whose sum is σ = 52167744. Its totient is φ = 51954700.

The previous prime is 52061203. The next prime is 52061231. The reversal of 52061221 is 12216025.

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 52061221 - 2⁵ = 52061189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52061231) 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, 52525 + ... + 53506.

It is an arithmetic number, because the mean of its divisors is an integer number (13041936).

Almost surely, 2^52061221 is an apocalyptic number.

It is an amenable number.

52061221 is a deficient number, since it is larger than the sum of its proper divisors (106523).

52061221 is a wasteful number, since it uses less digits than its factorization.

52061221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106522.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 52061221 is about 7215.3462148396. The cubic root of 52061221 is about 373.3975377637.

Adding to 52061221 its reverse (12216025), we get a palindrome (64277246).

The spelling of 52061221 in words is "fifty-two million, sixty-one thousand, two hundred twenty-one".