55102340 has 12 divisors (see below), whose sum is σ = 115714956. Its totient is φ = 22040928.

The previous prime is 55102331. The next prime is 55102343. The reversal of 55102340 is 4320155.

It can be written as a sum of positive squares in 2 ways, for example, as 32993536 + 22108804 = 5744^2 + 4702^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2755117 = 55102340 / (5 + 5 + 1 + 0 + 2 + 3 + 4 + 0).

It is not an unprimeable number, because it can be changed into a prime (55102343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1377539 + ... + 1377578.

It is an arithmetic number, because the mean of its divisors is an integer number (9642913).

Almost surely, 2^55102340 is an apocalyptic number.

It is an amenable number.

55102340 is an abundant number, since it is smaller than the sum of its proper divisors (60612616).

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

55102340 is a wasteful number, since it uses less digits than its factorization.

55102340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755126 (or 2755124 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 55102340 is about 7423.0950418272. The cubic root of 55102340 is about 380.5309751727.

Adding to 55102340 its reverse (4320155), we get a palindrome (59422495).

The spelling of 55102340 in words is "fifty-five million, one hundred two thousand, three hundred forty".