53350621 has 4 divisors (see below), whose sum is σ = 53365500. Its totient is φ = 53335744.

The previous prime is 53350589. The next prime is 53350673. The reversal of 53350621 is 12605335.

It is a happy number.

53350621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12605335 = 5 ⋅2521067.

It can be written as a sum of positive squares in 2 ways, for example, as 21031396 + 32319225 = 4586^2 + 5685^2 .

It is a cyclic number.

It is not a de Polignac number, because 53350621 - 2⁵ = 53350589 is a prime.

It is a super-2 number, since 2×53350621² = 5692577522171282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53350681) 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 3 ways as a sum of consecutive naturals, for example, 1605 + ... + 10453.

It is an arithmetic number, because the mean of its divisors is an integer number (13341375).

Almost surely, 2^53350621 is an apocalyptic number.

It is an amenable number.

53350621 is a deficient number, since it is larger than the sum of its proper divisors (14879).

53350621 is an equidigital number, since it uses as much as digits as its factorization.

53350621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14878.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 53350621 is about 7304.1509431282. The cubic root of 53350621 is about 376.4550779518.

Adding to 53350621 its reverse (12605335), we get a palindrome (65955956).

The spelling of 53350621 in words is "fifty-three million, three hundred fifty thousand, six hundred twenty-one".