55102860 has 72 divisors (see below), whose sum is σ = 168766416. Its totient is φ = 14551680.

The previous prime is 55102849. The next prime is 55102867. The reversal of 55102860 is 6820155.

It is not an unprimeable number, because it can be changed into a prime (55102867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17830 + ... + 20690.

It is an arithmetic number, because the mean of its divisors is an integer number (2343978).

Almost surely, 2^55102860 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 55102860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84383208).

55102860 is an abundant number, since it is smaller than the sum of its proper divisors (113663556).

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

55102860 is a wasteful number, since it uses less digits than its factorization.

55102860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2983 (or 2978 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 55102860 is about 7423.1300675658. The cubic root of 55102860 is about 380.5321721907.

The spelling of 55102860 in words is "fifty-five million, one hundred two thousand, eight hundred sixty".