53155640 has 16 divisors (see below), whose sum is σ = 119600280. Its totient is φ = 21262240.

The previous prime is 53155633. The next prime is 53155649. The reversal of 53155640 is 4655135.

53155640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53155649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 664406 + ... + 664485.

Almost surely, 2^53155640 is an apocalyptic number.

It is an amenable number.

53155640 is an abundant number, since it is smaller than the sum of its proper divisors (66444640).

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

53155640 is a wasteful number, since it uses less digits than its factorization.

53155640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328902 (or 1328898 counting only the distinct ones).

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

The square root of 53155640 is about 7290.7914522362. The cubic root of 53155640 is about 375.9959068515.

The spelling of 53155640 in words is "fifty-three million, one hundred fifty-five thousand, six hundred forty".