55609142 has 8 divisors (see below), whose sum is σ = 88320456. Its totient is φ = 26168992.

The previous prime is 55609139. The next prime is 55609171. The reversal of 55609142 is 24190655.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 55609099 and 55609108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817748 + ... + 817815.

It is an arithmetic number, because the mean of its divisors is an integer number (11040057).

Almost surely, 2^55609142 is an apocalyptic number.

55609142 is a deficient number, since it is larger than the sum of its proper divisors (32711314).

55609142 is a wasteful number, since it uses less digits than its factorization.

55609142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635582.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 55609142 is about 7457.1537465711. The cubic root of 55609142 is about 381.6940570932.

Adding to 55609142 its reverse (24190655), we get a palindrome (79799797).

The spelling of 55609142 in words is "fifty-five million, six hundred nine thousand, one hundred forty-two".