55520042 has 4 divisors (see below), whose sum is σ = 83280066. Its totient is φ = 27760020.

The previous prime is 55519973. The next prime is 55520051. The reversal of 55520042 is 24002555.

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., 46526041 + 8994001 = 6821^2 + 2999^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13880009 + ... + 13880012.

Almost surely, 2^55520042 is an apocalyptic number.

55520042 is a deficient number, since it is larger than the sum of its proper divisors (27760024).

55520042 is a wasteful number, since it uses less digits than its factorization.

55520042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27760023.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 55520042 is about 7451.1772224260. The cubic root of 55520042 is about 381.4900911079.

Adding to 55520042 its reverse (24002555), we get a palindrome (79522597).

The spelling of 55520042 in words is "fifty-five million, five hundred twenty thousand, forty-two".