55806042 has 16 divisors (see below), whose sum is σ = 113278752. Its totient is φ = 18324240.

The previous prime is 55806041. The next prime is 55806077. The reversal of 55806042 is 24060855.

It is a super-2 number, since 2×55806042² = 6228628647411528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55806041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69009 + ... + 69812.

It is an arithmetic number, because the mean of its divisors is an integer number (7079922).

Almost surely, 2^55806042 is an apocalyptic number.

55806042 is an abundant number, since it is smaller than the sum of its proper divisors (57472710).

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

55806042 is a wasteful number, since it uses less digits than its factorization.

55806042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138893.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 55806042 is about 7470.3441687783. The cubic root of 55806042 is about 382.1440252579.

Adding to 55806042 its reverse (24060855), we get a palindrome (79866897).

The spelling of 55806042 in words is "fifty-five million, eight hundred six thousand, forty-two".