55117442 has 32 divisors (see below), whose sum is σ = 91238400. Its totient is φ = 24872400.

The previous prime is 55117441. The next prime is 55117471. The reversal of 55117442 is 24471155.

It is not an unprimeable number, because it can be changed into a prime (55117441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83309 + ... + 83967.

It is an arithmetic number, because the mean of its divisors is an integer number (2851200).

Almost surely, 2^55117442 is an apocalyptic number.

55117442 is a deficient number, since it is larger than the sum of its proper divisors (36120958).

55117442 is a wasteful number, since it uses less digits than its factorization.

55117442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782.

The product of its digits is 5600, while the sum is 29.

The square root of 55117442 is about 7424.1122028159. The cubic root of 55117442 is about 380.5657362727.

Adding to 55117442 its reverse (24471155), we get a palindrome (79588597).

The spelling of 55117442 in words is "fifty-five million, one hundred seventeen thousand, four hundred forty-two".