55217632 has 24 divisors (see below), whose sum is σ = 115105536. Its totient is φ = 25984512.

The previous prime is 55217599. The next prime is 55217651. The reversal of 55217632 is 23671255.

It is a junction number, because it is equal to n+sod(n) for n = 55217594 and 55217603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50208 + ... + 51295.

It is an arithmetic number, because the mean of its divisors is an integer number (4796064).

Almost surely, 2^55217632 is an apocalyptic number.

It is an amenable number.

55217632 is an abundant number, since it is smaller than the sum of its proper divisors (59887904).

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

55217632 is a wasteful number, since it uses less digits than its factorization.

55217632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101530 (or 101522 counting only the distinct ones).

The product of its digits is 12600, while the sum is 31.

The square root of 55217632 is about 7430.8567473744. The cubic root of 55217632 is about 380.7961884372.

Adding to 55217632 its reverse (23671255), we get a palindrome (78888887).

The spelling of 55217632 in words is "fifty-five million, two hundred seventeen thousand, six hundred thirty-two".