55029216 has 144 divisors (see below), whose sum is σ = 166731264. Its totient is φ = 15744000.

The previous prime is 55029203. The next prime is 55029251. The reversal of 55029216 is 61292055.

It is a happy number.

It is a super-2 number, since 2×55029216² = 6056429227149312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1342156 + ... + 1342196.

It is an arithmetic number, because the mean of its divisors is an integer number (1157856).

Almost surely, 2^55029216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55029216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83365632).

55029216 is an abundant number, since it is smaller than the sum of its proper divisors (111702048).

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

55029216 is a wasteful number, since it uses less digits than its factorization.

55029216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 55029216 is about 7418.1679679015. The cubic root of 55029216 is about 380.3625717680.

The spelling of 55029216 in words is "fifty-five million, twenty-nine thousand, two hundred sixteen".