55189642 has 32 divisors (see below), whose sum is σ = 90331200. Its totient is φ = 25204608.

The previous prime is 55189621. The next prime is 55189657. The reversal of 55189642 is 24698155.

It is a junction number, because it is equal to n+sod(n) for n = 55189595 and 55189604.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134734 + ... + 135142.

It is an arithmetic number, because the mean of its divisors is an integer number (2822850).

Almost surely, 2^55189642 is an apocalyptic number.

55189642 is a deficient number, since it is larger than the sum of its proper divisors (35141558).

55189642 is a wasteful number, since it uses less digits than its factorization.

55189642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550.

The product of its digits is 86400, while the sum is 40.

The square root of 55189642 is about 7428.9731457315. The cubic root of 55189642 is about 380.7318352806.

The spelling of 55189642 in words is "fifty-five million, one hundred eighty-nine thousand, six hundred forty-two".