55664242 has 4 divisors (see below), whose sum is σ = 83496366. Its totient is φ = 27832120.

The previous prime is 55664237. The next prime is 55664267. The reversal of 55664242 is 24246655.

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., 54922921 + 741321 = 7411^2 + 861^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55664198 and 55664207.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13916059 + ... + 13916062.

Almost surely, 2^55664242 is an apocalyptic number.

55664242 is a deficient number, since it is larger than the sum of its proper divisors (27832124).

55664242 is a wasteful number, since it uses less digits than its factorization.

55664242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27832123.

The product of its digits is 57600, while the sum is 34.

The square root of 55664242 is about 7460.8472709204. The cubic root of 55664242 is about 381.8200819358.

The spelling of 55664242 in words is "fifty-five million, six hundred sixty-four thousand, two hundred forty-two".