55205532 has 18 divisors (see below), whose sum is σ = 139547408. Its totient is φ = 18401832.

The previous prime is 55205509. The next prime is 55205537. The reversal of 55205532 is 23550255.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 55205496 and 55205505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55205537) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 766708 + ... + 766779.

Almost surely, 2^55205532 is an apocalyptic number.

It is an amenable number.

55205532 is an abundant number, since it is smaller than the sum of its proper divisors (84341876).

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

55205532 is a wasteful number, since it uses less digits than its factorization.

55205532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533497 (or 1533492 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 55205532 is about 7430.0425301609. The cubic root of 55205532 is about 380.7683714139.

Adding to 55205532 its reverse (23550255), we get a palindrome (78755787).

The spelling of 55205532 in words is "fifty-five million, two hundred five thousand, five hundred thirty-two".