53481540 has 72 divisors (see below), whose sum is σ = 174206592. Its totient is φ = 12223680.

The previous prime is 53481529. The next prime is 53481559. The reversal of 53481540 is 4518435.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 53481498 and 53481507.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6156 + ... + 12035.

It is an arithmetic number, because the mean of its divisors is an integer number (2419536).

Almost surely, 2^53481540 is an apocalyptic number.

It is an amenable number.

53481540 is an abundant number, since it is smaller than the sum of its proper divisors (120725052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53481540 is a wasteful number, since it uses less digits than its factorization.

53481540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18217 (or 18208 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 53481540 is about 7313.1074106702. The cubic root of 53481540 is about 376.7627586130.

Adding to 53481540 its reverse (4518435), we get a palindrome (57999975).

The spelling of 53481540 in words is "fifty-three million, four hundred eighty-one thousand, five hundred forty".