55145142 has 24 divisors (see below), whose sum is σ = 128672544. Its totient is φ = 16967664.

The previous prime is 55145137. The next prime is 55145183. The reversal of 55145142 is 24154155.

55145142 is a `hidden beast` number, since 5 + 514 + 5 + 142 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117598 + ... + 118065.

It is an arithmetic number, because the mean of its divisors is an integer number (5361356).

Almost surely, 2^55145142 is an apocalyptic number.

55145142 is an abundant number, since it is smaller than the sum of its proper divisors (73527402).

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

55145142 is a wasteful number, since it uses less digits than its factorization.

55145142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235684 (or 235681 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 55145142 is about 7425.9775114122. The cubic root of 55145142 is about 380.6294783784.

Adding to 55145142 its reverse (24154155), we get a palindrome (79299297).

The spelling of 55145142 in words is "fifty-five million, one hundred forty-five thousand, one hundred forty-two".