55164340 has 96 divisors (see below), whose sum is σ = 146168064. Its totient is φ = 16988160.

The previous prime is 55164331. The next prime is 55164359. The reversal of 55164340 is 4346155.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 55164299 and 55164308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173862 + ... + 174178.

It is an arithmetic number, because the mean of its divisors is an integer number (1522584).

Almost surely, 2^55164340 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 55164340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73084032).

55164340 is an abundant number, since it is smaller than the sum of its proper divisors (91003724).

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

55164340 is a wasteful number, since it uses less digits than its factorization.

55164340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 55164340 is about 7427.2700233666. The cubic root of 55164340 is about 380.6736435073.

The spelling of 55164340 in words is "fifty-five million, one hundred sixty-four thousand, three hundred forty".