55045042 has 16 divisors (see below), whose sum is σ = 91089432. Its totient is φ = 24785280.

The previous prime is 55045013. The next prime is 55045043. The reversal of 55045042 is 24054055.

It can be written as a sum of positive squares in 4 ways, for example, as 17969121 + 37075921 = 4239^2 + 6089^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55044998 and 55045016.

It is not an unprimeable number, because it can be changed into a prime (55045043) 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, 24753 + ... + 26884.

Almost surely, 2^55045042 is an apocalyptic number.

55045042 is a deficient number, since it is larger than the sum of its proper divisors (36044390).

55045042 is a wasteful number, since it uses less digits than its factorization.

55045042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51693.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 55045042 is about 7419.2345966414. The cubic root of 55045042 is about 380.3990314375.

Adding to 55045042 its reverse (24054055), we get a palindrome (79099097).

The spelling of 55045042 in words is "fifty-five million, forty-five thousand, forty-two".