55645332 has 12 divisors (see below), whose sum is σ = 129839136. Its totient is φ = 18548440.

The previous prime is 55645297. The next prime is 55645333. The reversal of 55645332 is 23354655.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 55645293 and 55645302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55645333) 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, 2318544 + ... + 2318567.

It is an arithmetic number, because the mean of its divisors is an integer number (10819928).

Almost surely, 2^55645332 is an apocalyptic number.

It is an amenable number.

55645332 is an abundant number, since it is smaller than the sum of its proper divisors (74193804).

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

55645332 is a wasteful number, since it uses less digits than its factorization.

55645332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4637118 (or 4637116 counting only the distinct ones).

The product of its digits is 54000, while the sum is 33.

The square root of 55645332 is about 7459.5798809316. The cubic root of 55645332 is about 381.7768403188.

Adding to 55645332 its reverse (23354655), we get a palindrome (78999987).

The spelling of 55645332 in words is "fifty-five million, six hundred forty-five thousand, three hundred thirty-two".