53133621 has 4 divisors (see below), whose sum is σ = 70844832. Its totient is φ = 35422412.

The previous prime is 53133607. The next prime is 53133629. The reversal of 53133621 is 12633135.

It is a happy number.

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 53133621 - 2⁵ = 53133589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53133591 and 53133600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53133629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8855601 + ... + 8855606.

It is an arithmetic number, because the mean of its divisors is an integer number (17711208).

Almost surely, 2^53133621 is an apocalyptic number.

It is an amenable number.

53133621 is a deficient number, since it is larger than the sum of its proper divisors (17711211).

53133621 is a wasteful number, since it uses less digits than its factorization.

53133621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17711210.

The product of its digits is 1620, while the sum is 24.

The square root of 53133621 is about 7289.2812402870. The cubic root of 53133621 is about 375.9439826198.

Adding to 53133621 its reverse (12633135), we get a palindrome (65766756).

The spelling of 53133621 in words is "fifty-three million, one hundred thirty-three thousand, six hundred twenty-one".