55209696 has 48 divisors (see below), whose sum is σ = 145732608. Its totient is φ = 18300800.

The previous prime is 55209673. The next prime is 55209719. The reversal of 55209696 is 69690255.

55209696 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55209673) and next prime (55209719).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×55209696² = 6096221064824832, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 16831 + ... + 19841.

It is an arithmetic number, because the mean of its divisors is an integer number (3036096).

Almost surely, 2^55209696 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 55209696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72866304).

55209696 is an abundant number, since it is smaller than the sum of its proper divisors (90522912).

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

55209696 is a wasteful number, since it uses less digits than its factorization.

55209696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215 (or 3207 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 42.

The square root of 55209696 is about 7430.3227386164. The cubic root of 55209696 is about 380.7779446068. Note that the first 3 decimals are identical.

The spelling of 55209696 in words is "fifty-five million, two hundred nine thousand, six hundred ninety-six".