55172542 has 8 divisors (see below), whose sum is σ = 87114600. Its totient is φ = 26134344.

The previous prime is 55172539. The next prime is 55172567. The reversal of 55172542 is 24527155.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 725917 + ... + 725992.

It is an arithmetic number, because the mean of its divisors is an integer number (10889325).

Almost surely, 2^55172542 is an apocalyptic number.

55172542 is a deficient number, since it is larger than the sum of its proper divisors (31942058).

55172542 is a wasteful number, since it uses less digits than its factorization.

55172542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451930.

The product of its digits is 14000, while the sum is 31.

The square root of 55172542 is about 7427.8221572679. The cubic root of 55172542 is about 380.6925091397.

Adding to 55172542 its reverse (24527155), we get a palindrome (79699697).

The spelling of 55172542 in words is "fifty-five million, one hundred seventy-two thousand, five hundred forty-two".