55445242 has 16 divisors (see below), whose sum is σ = 85168512. Its totient is φ = 27059040.

The previous prime is 55445239. The next prime is 55445311. The reversal of 55445242 is 24254455.

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, 53158 + ... + 54190.

It is an arithmetic number, because the mean of its divisors is an integer number (5323032).

Almost surely, 2^55445242 is an apocalyptic number.

55445242 is a deficient number, since it is larger than the sum of its proper divisors (29723270).

55445242 is a wasteful number, since it uses less digits than its factorization.

55445242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653.

The product of its digits is 32000, while the sum is 31.

The square root of 55445242 is about 7446.1561896055. The cubic root of 55445242 is about 381.3186918420.

Adding to 55445242 its reverse (24254455), we get a palindrome (79699697).

It can be divided in two parts, 554 and 45242, that added together give a square (45796 = 214²).

The spelling of 55445242 in words is "fifty-five million, four hundred forty-five thousand, two hundred forty-two".