53221481 has 8 divisors (see below), whose sum is σ = 54237600. Its totient is φ = 52209280.

The previous prime is 53221477. The next prime is 53221507. The reversal of 53221481 is 18412235.

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

It is a cyclic number.

It is not a de Polignac number, because 53221481 - 2² = 53221477 is a prime.

It is a super-2 number, since 2×53221481² = 5665052079666722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53221481.

It is not an unprimeable number, because it can be changed into a prime (53221081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54326 + ... + 55296.

It is an arithmetic number, because the mean of its divisors is an integer number (6779700).

Almost surely, 2^53221481 is an apocalyptic number.

It is an amenable number.

53221481 is a deficient number, since it is larger than the sum of its proper divisors (1016119).

53221481 is an equidigital number, since it uses as much as digits as its factorization.

53221481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959.

The product of its digits is 1920, while the sum is 26.

The square root of 53221481 is about 7295.3054082746. The cubic root of 53221481 is about 376.1510846918.

The spelling of 53221481 in words is "fifty-three million, two hundred twenty-one thousand, four hundred eighty-one".