55153442 has 4 divisors (see below), whose sum is σ = 82730166. Its totient is φ = 27576720.

The previous prime is 55153429. The next prime is 55153453. The reversal of 55153442 is 24435155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24435155 = 5 ⋅4887031.

It can be written as a sum of positive squares in only one way, i.e., 31348801 + 23804641 = 5599^2 + 4879^2 .

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 as a sum of consecutive naturals, namely, 13788359 + ... + 13788362.

Almost surely, 2^55153442 is an apocalyptic number.

55153442 is a deficient number, since it is larger than the sum of its proper divisors (27576724).

55153442 is a wasteful number, since it uses less digits than its factorization.

55153442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27576723.

The product of its digits is 12000, while the sum is 29.

The square root of 55153442 is about 7426.5363393711. The cubic root of 55153442 is about 380.6485738422.

Adding to 55153442 its reverse (24435155), we get a palindrome (79588597).

The spelling of 55153442 in words is "fifty-five million, one hundred fifty-three thousand, four hundred forty-two".