53481481 has 4 divisors (see below), whose sum is σ = 55325700. Its totient is φ = 51637264.

The previous prime is 53481451. The next prime is 53481503. The reversal of 53481481 is 18418435.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45968400 + 7513081 = 6780^2 + 2741^2 .

It is a cyclic number.

It is not a de Polignac number, because 53481481 - 2¹³ = 53473289 is a prime.

It is a super-2 number, since 2×53481481² = 5720537619906722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53481401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922066 + ... + 922123.

It is an arithmetic number, because the mean of its divisors is an integer number (13831425).

Almost surely, 2^53481481 is an apocalyptic number.

It is an amenable number.

53481481 is a deficient number, since it is larger than the sum of its proper divisors (1844219).

53481481 is a wasteful number, since it uses less digits than its factorization.

53481481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844218.

The product of its digits is 15360, while the sum is 34.

The square root of 53481481 is about 7313.1033768162. The cubic root of 53481481 is about 376.7626200667.

The spelling of 53481481 in words is "fifty-three million, four hundred eighty-one thousand, four hundred eighty-one".