55905442 has 8 divisors (see below), whose sum is σ = 83927376. Its totient is φ = 27929652.

The previous prime is 55905389. The next prime is 55905457. The reversal of 55905442 is 24450955.

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 = 55905398 and 55905407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8328 + ... + 13459.

It is an arithmetic number, because the mean of its divisors is an integer number (10490922).

Almost surely, 2^55905442 is an apocalyptic number.

55905442 is a deficient number, since it is larger than the sum of its proper divisors (28021934).

55905442 is a wasteful number, since it uses less digits than its factorization.

55905442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23072.

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

The square root of 55905442 is about 7476.9941821564. The cubic root of 55905442 is about 382.3707783979.

The spelling of 55905442 in words is "fifty-five million, nine hundred five thousand, four hundred forty-two".