55102420 has 12 divisors (see below), whose sum is σ = 115715124. Its totient is φ = 22040960.

The previous prime is 55102417. The next prime is 55102427. The reversal of 55102420 is 2420155.

55102420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11383876 + 43718544 = 3374^2 + 6612^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55102427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1377541 + ... + 1377580.

It is an arithmetic number, because the mean of its divisors is an integer number (9642927).

Almost surely, 2^55102420 is an apocalyptic number.

It is an amenable number.

55102420 is an abundant number, since it is smaller than the sum of its proper divisors (60612704).

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

55102420 is a wasteful number, since it uses less digits than its factorization.

55102420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755130 (or 2755128 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 55102420 is about 7423.1004304132. The cubic root of 55102420 is about 380.5311593298.

Adding to 55102420 its reverse (2420155), we get a palindrome (57522575).

The spelling of 55102420 in words is "fifty-five million, one hundred two thousand, four hundred twenty".