55371904 has 64 divisors (see below), whose sum is σ = 130478400. Its totient is φ = 22901760.

The previous prime is 55371889. The next prime is 55371923. The reversal of 55371904 is 40917355.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 55371904.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24919 + ... + 27049.

It is an arithmetic number, because the mean of its divisors is an integer number (2038725).

Almost surely, 2^55371904 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 55371904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65239200).

55371904 is an abundant number, since it is smaller than the sum of its proper divisors (75106496).

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

55371904 is a wasteful number, since it uses less digits than its factorization.

55371904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181 (or 2169 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 55371904 is about 7441.2300058525. The cubic root of 55371904 is about 381.1504929235.

The spelling of 55371904 in words is "fifty-five million, three hundred seventy-one thousand, nine hundred four".