55851442 has 4 divisors (see below), whose sum is σ = 83777166. Its totient is φ = 27925720.

The previous prime is 55851437. The next prime is 55851449. The reversal of 55851442 is 24415855.

It is a happy number.

55851442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 38303721 + 17547721 = 6189^2 + 4189^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55851398 and 55851407.

It is not an unprimeable number, because it can be changed into a prime (55851449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13962859 + ... + 13962862.

Almost surely, 2^55851442 is an apocalyptic number.

55851442 is a deficient number, since it is larger than the sum of its proper divisors (27925724).

55851442 is a wasteful number, since it uses less digits than its factorization.

55851442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27925723.

The product of its digits is 32000, while the sum is 34.

The square root of 55851442 is about 7473.3822329652. The cubic root of 55851442 is about 382.2476259644.

The spelling of 55851442 in words is "fifty-five million, eight hundred fifty-one thousand, four hundred forty-two".