55521436 has 12 divisors (see below), whose sum is σ = 97251112. Its totient is φ = 27735408.

The previous prime is 55521377. The next prime is 55521443. The reversal of 55521436 is 63412555.

55521436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 55521398 and 55521407.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 870 + ... + 10573.

Almost surely, 2^55521436 is an apocalyptic number.

It is an amenable number.

55521436 is a deficient number, since it is larger than the sum of its proper divisors (41729676).

55521436 is a wasteful number, since it uses less digits than its factorization.

55521436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12660 (or 12658 counting only the distinct ones).

The product of its digits is 18000, while the sum is 31.

The square root of 55521436 is about 7451.2707641046. The cubic root of 55521436 is about 381.4932839052.

The spelling of 55521436 in words is "fifty-five million, five hundred twenty-one thousand, four hundred thirty-six".