55103140 has 12 divisors (see below), whose sum is σ = 115716636. Its totient is φ = 22041248.

The previous prime is 55103131. The next prime is 55103143. The reversal of 55103140 is 4130155.

It can be written as a sum of positive squares in 2 ways, for example, as 23270976 + 31832164 = 4824^2 + 5642^2 .

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (55103143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1377559 + ... + 1377598.

It is an arithmetic number, because the mean of its divisors is an integer number (9643053).

Almost surely, 2^55103140 is an apocalyptic number.

It is an amenable number.

55103140 is an abundant number, since it is smaller than the sum of its proper divisors (60613496).

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

55103140 is a wasteful number, since it uses less digits than its factorization.

55103140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2755166 (or 2755164 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 55103140 is about 7423.1489275105. The cubic root of 55103140 is about 380.5328167358.

Adding to 55103140 its reverse (4130155), we get a palindrome (59233295).

The spelling of 55103140 in words is "fifty-five million, one hundred three thousand, one hundred forty".