55590042 has 16 divisors (see below), whose sum is σ = 115014240. Its totient is φ = 17890992.

The previous prime is 55590019. The next prime is 55590043. The reversal of 55590042 is 24009555.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 55589991 and 55590009.

It is not an unprimeable number, because it can be changed into a prime (55590043) 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, 159568 + ... + 159915.

It is an arithmetic number, because the mean of its divisors is an integer number (7188390).

Almost surely, 2^55590042 is an apocalyptic number.

55590042 is an abundant number, since it is smaller than the sum of its proper divisors (59424198).

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

55590042 is a wasteful number, since it uses less digits than its factorization.

55590042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319517.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 55590042 is about 7455.8729871156. The cubic root of 55590042 is about 381.6503521012.

Adding to 55590042 its reverse (24009555), we get a palindrome (79599597).

The spelling of 55590042 in words is "fifty-five million, five hundred ninety thousand, forty-two".