53325421 has 2 divisors, whose sum is σ = 53325422. Its totient is φ = 53325420.

The previous prime is 53325409. The next prime is 53325443. The reversal of 53325421 is 12452335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52490025 + 835396 = 7245^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 53325421 - 2¹⁵ = 53292653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53325451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26662710 + 26662711.

It is an arithmetic number, because the mean of its divisors is an integer number (26662711).

Almost surely, 2^53325421 is an apocalyptic number.

It is an amenable number.

53325421 is a deficient number, since it is larger than the sum of its proper divisors (1).

53325421 is an equidigital number, since it uses as much as digits as its factorization.

53325421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 25.

The square root of 53325421 is about 7302.4256928777. The cubic root of 53325421 is about 376.3957961550.

Adding to 53325421 its reverse (12452335), we get a palindrome (65777756).

The spelling of 53325421 in words is "fifty-three million, three hundred twenty-five thousand, four hundred twenty-one".