55063642 has 4 divisors (see below), whose sum is σ = 82595466. Its totient is φ = 27531820.

The previous prime is 55063621. The next prime is 55063643. The reversal of 55063642 is 24636055.

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., 51681721 + 3381921 = 7189^2 + 1839^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (55063643) by changing a digit.

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, 13765909 + ... + 13765912.

Almost surely, 2^55063642 is an apocalyptic number.

55063642 is a deficient number, since it is larger than the sum of its proper divisors (27531824).

55063642 is a wasteful number, since it uses less digits than its factorization.

55063642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27531823.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 55063642 is about 7420.4879893441. The cubic root of 55063642 is about 380.4418728690.

Adding to 55063642 its reverse (24636055), we get a palindrome (79699697).

The spelling of 55063642 in words is "fifty-five million, sixty-three thousand, six hundred forty-two".