55321642 has 8 divisors (see below), whose sum is σ = 83744100. Its totient is φ = 27406944.

The previous prime is 55321633. The next prime is 55321649. The reversal of 55321642 is 24612355.

It can be written as a sum of positive squares in 2 ways, for example, as 52113961 + 3207681 = 7219^2 + 1791^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 55321642.

It is not an unprimeable number, because it can be changed into a prime (55321649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126667 + ... + 127102.

Almost surely, 2^55321642 is an apocalyptic number.

55321642 is a deficient number, since it is larger than the sum of its proper divisors (28422458).

55321642 is a wasteful number, since it uses less digits than its factorization.

55321642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253880.

The product of its digits is 7200, while the sum is 28.

The square root of 55321642 is about 7437.8519748648. The cubic root of 55321642 is about 381.0351324602.

Adding to 55321642 its reverse (24612355), we get a palindrome (79933997).

The spelling of 55321642 in words is "fifty-five million, three hundred twenty-one thousand, six hundred forty-two".