55217436 has 12 divisors (see below), whose sum is σ = 128840712. Its totient is φ = 18405808.

The previous prime is 55217389. The next prime is 55217443. The reversal of 55217436 is 63471255.

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 = 55217397 and 55217406.

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, 2300715 + ... + 2300738.

It is an arithmetic number, because the mean of its divisors is an integer number (10736726).

Almost surely, 2^55217436 is an apocalyptic number.

It is an amenable number.

55217436 is an abundant number, since it is smaller than the sum of its proper divisors (73623276).

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

55217436 is a wasteful number, since it uses less digits than its factorization.

55217436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4601460 (or 4601458 counting only the distinct ones).

The product of its digits is 25200, while the sum is 33.

The square root of 55217436 is about 7430.8435591122. The cubic root of 55217436 is about 380.7957378798.

The spelling of 55217436 in words is "fifty-five million, two hundred seventeen thousand, four hundred thirty-six".