55623442 has 8 divisors (see below), whose sum is σ = 95354496. Its totient is φ = 23838612.

The previous prime is 55623437. The next prime is 55623443. The reversal of 55623442 is 24432655.

55623442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (55623443) 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 in 3 ways as a sum of consecutive naturals, for example, 1986538 + ... + 1986565.

It is an arithmetic number, because the mean of its divisors is an integer number (11919312).

Almost surely, 2^55623442 is an apocalyptic number.

55623442 is a deficient number, since it is larger than the sum of its proper divisors (39731054).

55623442 is a wasteful number, since it uses less digits than its factorization.

55623442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3973112.

The product of its digits is 28800, while the sum is 31.

The square root of 55623442 is about 7458.1124957995. The cubic root of 55623442 is about 381.7267720811.

It can be divided in two parts, 55623 and 442, that added together give a palindrome (56065).

The spelling of 55623442 in words is "fifty-five million, six hundred twenty-three thousand, four hundred forty-two".