53521650 has 144 divisors (see below), whose sum is σ = 177113664. Its totient is φ = 11283840.

The previous prime is 53521619. The next prime is 53521681. The reversal of 53521650 is 5612535.

53521650 is a `hidden beast` number, since 5 + 3 + 5 + 2 + 1 + 650 = 666.

53521650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (53521619) and next prime (53521681).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 40297 + ... + 41603.

It is an arithmetic number, because the mean of its divisors is an integer number (1229956).

Almost surely, 2^53521650 is an apocalyptic number.

53521650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 53521650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88556832).

53521650 is an abundant number, since it is smaller than the sum of its proper divisors (123592014).

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

53521650 is a wasteful number, since it uses less digits than its factorization.

53521650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345 (or 1337 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 53521650 is about 7315.8492330009. The cubic root of 53521650 is about 376.8569230540.

The spelling of 53521650 in words is "fifty-three million, five hundred twenty-one thousand, six hundred fifty".