53512540 has 48 divisors (see below), whose sum is σ = 117028800. Its totient is φ = 20529152.

The previous prime is 53512523. The next prime is 53512561. The reversal of 53512540 is 4521535.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 148881 + ... + 149239.

It is an arithmetic number, because the mean of its divisors is an integer number (2438100).

Almost surely, 2^53512540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53512540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58514400).

53512540 is an abundant number, since it is smaller than the sum of its proper divisors (63516260).

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

53512540 is a wasteful number, since it uses less digits than its factorization.

53512540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 53512540 is about 7315.2265856910. The cubic root of 53512540 is about 376.8355400474.

The spelling of 53512540 in words is "fifty-three million, five hundred twelve thousand, five hundred forty".