55142101 has 24 divisors (see below), whose sum is σ = 69255000. Its totient is φ = 43610112.

The previous prime is 55142093. The next prime is 55142141. The reversal of 55142101 is 10124155.

It can be written as a sum of positive squares in 4 ways, for example, as 18054001 + 37088100 = 4249^2 + 6090^2 .

It is not a de Polignac number, because 55142101 - 2³ = 55142093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55142141) 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, 43525 + ... + 44773.

It is an arithmetic number, because the mean of its divisors is an integer number (2885625).

Almost surely, 2^55142101 is an apocalyptic number.

It is an amenable number.

55142101 is a deficient number, since it is larger than the sum of its proper divisors (14112899).

55142101 is a wasteful number, since it uses less digits than its factorization.

55142101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333 (or 1326 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 55142101 is about 7425.7727544007. The cubic root of 55142101 is about 380.6224815969.

Adding to 55142101 its reverse (10124155), we get a palindrome (65266256).

The spelling of 55142101 in words is "fifty-five million, one hundred forty-two thousand, one hundred one".