55409542 has 8 divisors (see below), whose sum is σ = 85047336. Its totient is φ = 27060432.

The previous prime is 55409503. The next prime is 55409551. The reversal of 55409542 is 24590455.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 55409498 and 55409507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322063 + ... + 322234.

It is an arithmetic number, because the mean of its divisors is an integer number (10630917).

Almost surely, 2^55409542 is an apocalyptic number.

55409542 is a deficient number, since it is larger than the sum of its proper divisors (29637794).

55409542 is a wasteful number, since it uses less digits than its factorization.

55409542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644342.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 55409542 is about 7443.7585936138. The cubic root of 55409542 is about 381.2368332997.

Adding to 55409542 its reverse (24590455), we get a palindrome (79999997).

The spelling of 55409542 in words is "fifty-five million, four hundred nine thousand, five hundred forty-two".