53320121 has 2 divisors, whose sum is σ = 53320122. Its totient is φ = 53320120.

The previous prime is 53320117. The next prime is 53320139. The reversal of 53320121 is 12102335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51681721 + 1638400 = 7189^2 + 1280^2 .

It is a cyclic number.

It is not a de Polignac number, because 53320121 - 2² = 53320117 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53320121.

It is not a weakly prime, because it can be changed into another prime (53320151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26660060 + 26660061.

It is an arithmetic number, because the mean of its divisors is an integer number (26660061).

Almost surely, 2^53320121 is an apocalyptic number.

It is an amenable number.

53320121 is a deficient number, since it is larger than the sum of its proper divisors (1).

53320121 is an equidigital number, since it uses as much as digits as its factorization.

53320121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 53320121 is about 7302.0627907462. The cubic root of 53320121 is about 376.3833257811.

Adding to 53320121 its reverse (12102335), we get a palindrome (65422456).

The spelling of 53320121 in words is "fifty-three million, three hundred twenty thousand, one hundred twenty-one".