55240042 has 16 divisors (see below), whose sum is σ = 97346592. Its totient is φ = 23177520.

The previous prime is 55240037. The next prime is 55240057. The reversal of 55240042 is 24004255.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 55239995 and 55240022.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96288 + ... + 96859.

It is an arithmetic number, because the mean of its divisors is an integer number (6084162).

Almost surely, 2^55240042 is an apocalyptic number.

55240042 is a deficient number, since it is larger than the sum of its proper divisors (42106550).

55240042 is a wasteful number, since it uses less digits than its factorization.

55240042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193173.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 55240042 is about 7432.3644959057. The cubic root of 55240042 is about 380.8476966728.

Adding to 55240042 its reverse (24004255), we get a palindrome (79244297).

The spelling of 55240042 in words is "fifty-five million, two hundred forty thousand, forty-two".