53421481 has 3 divisors (see below), whose sum is σ = 53428791. Its totient is φ = 53414172.

The previous prime is 53421461. The next prime is 53421493. The reversal of 53421481 is 18412435.

The square root of 53421481 is 7309.

It is a perfect power (a square), and thus also a powerful number.

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.

It can be written as a sum of positive squares in only one way, i.e., 23609881 + 29811600 = 4859^2 + 5460^2 .

It is not a de Polignac number, because 53421481 - 2⁷ = 53421353 is a prime.

It is a super-2 number, since 2×53421481² = 5707709264466722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53421461) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3655 + ... + 10963.

It is an arithmetic number, because the mean of its divisors is an integer number (17809597).

Almost surely, 2^53421481 is an apocalyptic number.

53421481 is the 7309-th square number.

53421481 is the 3655-th centered octagonal number.

It is an amenable number.

53421481 is a deficient number, since it is larger than the sum of its proper divisors (7310).

53421481 is an frugal number, since it uses more digits than its factorization.

53421481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14618 (or 7309 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The cubic root of 53421481 is about 376.6216727349.

The spelling of 53421481 in words is "fifty-three million, four hundred twenty-one thousand, four hundred eighty-one".