55505712 has 20 divisors (see below), whose sum is σ = 143389880. Its totient is φ = 18501888.

The previous prime is 55505711. The next prime is 55505719. The reversal of 55505712 is 21750555.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 55505712.

It is not an unprimeable number, because it can be changed into a prime (55505711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578137 + ... + 578232.

It is an arithmetic number, because the mean of its divisors is an integer number (7169494).

Almost surely, 2^55505712 is an apocalyptic number.

It is an amenable number.

55505712 is an abundant number, since it is smaller than the sum of its proper divisors (87884168).

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

55505712 is a wasteful number, since it uses less digits than its factorization.

55505712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156380 (or 1156374 counting only the distinct ones).

The product of its (nonzero) digits is 8750, while the sum is 30.

The square root of 55505712 is about 7450.2155673511. The cubic root of 55505712 is about 381.4572667847.

The spelling of 55505712 in words is "fifty-five million, five hundred five thousand, seven hundred twelve".