55091712 has 160 divisors (see below), whose sum is σ = 164989440. Its totient is φ = 16220160.

The previous prime is 55091689. The next prime is 55091737. The reversal of 55091712 is 21719055.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 55091712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 618964 + ... + 619052.

It is an arithmetic number, because the mean of its divisors is an integer number (1031184).

Almost surely, 2^55091712 is an apocalyptic number.

55091712 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55091712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82494720).

55091712 is an abundant number, since it is smaller than the sum of its proper divisors (109897728).

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

55091712 is a wasteful number, since it uses less digits than its factorization.

55091712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 55091712 is about 7422.3791334046. The cubic root of 55091712 is about 380.5065083155.

The spelling of 55091712 in words is "fifty-five million, ninety-one thousand, seven hundred twelve".