55204416 has 140 divisors (see below), whose sum is σ = 171126912. Its totient is φ = 17563392.

The previous prime is 55204411. The next prime is 55204421. The reversal of 55204416 is 61440255.

It is an interprime number because it is at equal distance from previous prime (55204411) and next prime (55204421).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 55204416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55204411) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 119001 + ... + 119463.

Almost surely, 2^55204416 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 55204416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85563456).

55204416 is an abundant number, since it is smaller than the sum of its proper divisors (115922496).

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

55204416 is a wasteful number, since it uses less digits than its factorization.

55204416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 55204416 is about 7429.9674292691. The cubic root of 55204416 is about 380.7658056060.

The spelling of 55204416 in words is "fifty-five million, two hundred four thousand, four hundred sixteen".