55682172 has 144 divisors (see below), whose sum is σ = 181009920. Its totient is φ = 14027904.

The previous prime is 55682153. The next prime is 55682177. The reversal of 55682172 is 27128655.

It is a happy number.

55682172 is a `hidden beast` number, since 5 + 568 + 21 + 72 = 666.

55682172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55682177) 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 47 ways as a sum of consecutive naturals, for example, 74979 + ... + 75717.

Almost surely, 2^55682172 is an apocalyptic number.

55682172 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 55682172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90504960).

55682172 is an abundant number, since it is smaller than the sum of its proper divisors (125327748).

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

55682172 is a wasteful number, since it uses less digits than its factorization.

55682172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792 (or 787 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 55682172 is about 7462.0487803284. The cubic root of 55682172 is about 381.8610735365.

It can be divided in two parts, 556 and 82172, that added together give a palindrome (82728).

The spelling of 55682172 in words is "fifty-five million, six hundred eighty-two thousand, one hundred seventy-two".