53511481 has 2 divisors, whose sum is σ = 53511482. Its totient is φ = 53511480.

The previous prime is 53511473. The next prime is 53511527. The reversal of 53511481 is 18411535.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53421481 + 90000 = 7309^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 53511481 - 2³ = 53511473 is a prime.

It is a super-2 number, since 2×53511481² = 5726957197626722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53511421) 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 as a sum of consecutive naturals, namely, 26755740 + 26755741.

It is an arithmetic number, because the mean of its divisors is an integer number (26755741).

Almost surely, 2^53511481 is an apocalyptic number.

It is an amenable number.

53511481 is a deficient number, since it is larger than the sum of its proper divisors (1).

53511481 is an equidigital number, since it uses as much as digits as its factorization.

53511481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 28.

The square root of 53511481 is about 7315.1542020657. The cubic root of 53511481 is about 376.8330542035.

The spelling of 53511481 in words is "fifty-three million, five hundred eleven thousand, four hundred eighty-one".