55071242 has 16 divisors (see below), whose sum is σ = 83841480. Its totient is φ = 27126528.

The previous prime is 55071239. The next prime is 55071251. The reversal of 55071242 is 24217055.

It is a Cunningham number, because it is equal to 7421²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 55071241 + 1 = 7421^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81008 + ... + 81684.

Almost surely, 2^55071242 is an apocalyptic number.

55071242 is a deficient number, since it is larger than the sum of its proper divisors (28770238).

55071242 is a wasteful number, since it uses less digits than its factorization.

55071242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 55071242 is about 7421.0000673764. Note that the first 4 decimals coincide. The cubic root of 55071242 is about 380.4593751937.

Adding to 55071242 its reverse (24217055), we get a palindrome (79288297).

The spelling of 55071242 in words is "fifty-five million, seventy-one thousand, two hundred forty-two".