55643502 has 16 divisors (see below), whose sum is σ = 111755520. Its totient is φ = 18469752.

The previous prime is 55643461. The next prime is 55643503. The reversal of 55643502 is 20534655.

55643502 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55643502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55643503) 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 7 ways as a sum of consecutive naturals, for example, 17968 + ... + 20835.

It is an arithmetic number, because the mean of its divisors is an integer number (6984720).

Almost surely, 2^55643502 is an apocalyptic number.

55643502 is an abundant number, since it is smaller than the sum of its proper divisors (56112018).

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

55643502 is a wasteful number, since it uses less digits than its factorization.

55643502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39047.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 55643502 is about 7459.4572188598. The cubic root of 55643502 is about 381.7726551263.

The spelling of 55643502 in words is "fifty-five million, six hundred forty-three thousand, five hundred two".