53551640 has 16 divisors (see below), whose sum is σ = 120491280. Its totient is φ = 21420640.

The previous prime is 53551627. The next prime is 53551669. The reversal of 53551640 is 4615535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669356 + ... + 669435.

It is an arithmetic number, because the mean of its divisors is an integer number (7530705).

Almost surely, 2^53551640 is an apocalyptic number.

It is an amenable number.

53551640 is an abundant number, since it is smaller than the sum of its proper divisors (66939640).

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

53551640 is a wasteful number, since it uses less digits than its factorization.

53551640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338802 (or 1338798 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 53551640 is about 7317.8986054741. The cubic root of 53551640 is about 376.9272984929.

The spelling of 53551640 in words is "fifty-three million, five hundred fifty-one thousand, six hundred forty".