53221533 has 8 divisors (see below), whose sum is σ = 71359200. Its totient is φ = 35282448.

The previous prime is 53221523. The next prime is 53221537. The reversal of 53221533 is 33512235.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53221533 - 2⁸ = 53221277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53221537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49018 + ... + 50091.

It is an arithmetic number, because the mean of its divisors is an integer number (8919900).

Almost surely, 2^53221533 is an apocalyptic number.

It is an amenable number.

53221533 is a deficient number, since it is larger than the sum of its proper divisors (18137667).

53221533 is a wasteful number, since it uses less digits than its factorization.

53221533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99291.

The product of its digits is 2700, while the sum is 24.

The square root of 53221533 is about 7295.3089722095. The cubic root of 53221533 is about 376.1512071978.

Adding to 53221533 its reverse (33512235), we get a palindrome (86733768).

The spelling of 53221533 in words is "fifty-three million, two hundred twenty-one thousand, five hundred thirty-three".