55072042 has 4 divisors (see below), whose sum is σ = 82608066. Its totient is φ = 27536020.

The previous prime is 55072001. The next prime is 55072063. The reversal of 55072042 is 24027055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 54597321 + 474721 = 7389^2 + 689^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55071998 and 55072016.

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, 13768009 + ... + 13768012.

Almost surely, 2^55072042 is an apocalyptic number.

55072042 is a deficient number, since it is larger than the sum of its proper divisors (27536024).

55072042 is a wasteful number, since it uses less digits than its factorization.

55072042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27536023.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 55072042 is about 7421.0539682716. The cubic root of 55072042 is about 380.4612174500.

Adding to 55072042 its reverse (24027055), we get a palindrome (79099097).

The spelling of 55072042 in words is "fifty-five million, seventy-two thousand, forty-two".