55420110 has 96 divisors (see below), whose sum is σ = 154260288. Its totient is φ = 13770240.

The previous prime is 55420109. The next prime is 55420111. The reversal of 55420110 is 1102455.

55420110 is a `hidden beast` number, since 554 + 2 + 0 + 110 = 666.

It is an interprime number because it is at equal distance from previous prime (55420109) and next prime (55420111).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55420111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84544 + ... + 85196.

It is an arithmetic number, because the mean of its divisors is an integer number (1606878).

Almost surely, 2^55420110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55420110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77130144).

55420110 is an abundant number, since it is smaller than the sum of its proper divisors (98840178).

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

55420110 is a wasteful number, since it uses less digits than its factorization.

55420110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 55420110 is about 7444.4684162135. The cubic root of 55420110 is about 381.2610689252.

Adding to 55420110 its reverse (1102455), we get a palindrome (56522565).

The spelling of 55420110 in words is "fifty-five million, four hundred twenty thousand, one hundred ten".