55231636 has 6 divisors (see below), whose sum is σ = 96655370. Its totient is φ = 27615816.

The previous prime is 55231621. The next prime is 55231663. The reversal of 55231636 is 63613255.

It can be written as a sum of positive squares in only one way, i.e., 44142736 + 11088900 = 6644^2 + 3330^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55231598 and 55231607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6903951 + ... + 6903958.

Almost surely, 2^55231636 is an apocalyptic number.

It is an amenable number.

55231636 is a deficient number, since it is larger than the sum of its proper divisors (41423734).

55231636 is a wasteful number, since it uses less digits than its factorization.

55231636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13807913 (or 13807911 counting only the distinct ones).

The product of its digits is 16200, while the sum is 31.

The square root of 55231636 is about 7431.7989746763. The cubic root of 55231636 is about 380.8283775459.

The spelling of 55231636 in words is "fifty-five million, two hundred thirty-one thousand, six hundred thirty-six".