55211904 has 96 divisors (see below), whose sum is σ = 173361240. Its totient is φ = 16727040.

The previous prime is 55211873. The next prime is 55211909. The reversal of 55211904 is 40911255.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55211909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10494 + ... + 14850.

Almost surely, 2^55211904 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 55211904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86680620).

55211904 is an abundant number, since it is smaller than the sum of its proper divisors (118149336).

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

55211904 is a wasteful number, since it uses less digits than its factorization.

55211904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4388 (or 4373 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 55211904 is about 7430.4713174872. The cubic root of 55211904 is about 380.7830206868.

The spelling of 55211904 in words is "fifty-five million, two hundred eleven thousand, nine hundred four".