53561508 has 180 divisors, whose sum is σ = 172227888. Its totient is φ = 12841920.

The previous prime is 53561507. The next prime is 53561567. The reversal of 53561508 is 80516535.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (53561507) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4120110 + ... + 4120122.

Almost surely, 2^53561508 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 53561508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86113944).

53561508 is an abundant number, since it is smaller than the sum of its proper divisors (118666380).

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

53561508 is a wasteful number, since it uses less digits than its factorization.

53561508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 53561508 is about 7318.5728116894. The cubic root of 53561508 is about 376.9504492942.

Multiplying 53561508 by its sum of digits (33), we get a square (1767529764 = 42042²).

53561508 divided by its sum of digits (33) gives a square (1623076 = 1274²).

The spelling of 53561508 in words is "fifty-three million, five hundred sixty-one thousand, five hundred eight".