55623447 has 24 divisors (see below), whose sum is σ = 89311248. Its totient is φ = 33072000.

The previous prime is 55623443. The next prime is 55623457. The reversal of 55623447 is 74432655.

It is not a de Polignac number, because 55623447 - 2² = 55623443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55623443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54 + ... + 10547.

It is an arithmetic number, because the mean of its divisors is an integer number (3721302).

Almost surely, 2^55623447 is an apocalyptic number.

55623447 is a deficient number, since it is larger than the sum of its proper divisors (33687801).

55623447 is a wasteful number, since it uses less digits than its factorization.

55623447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10671 (or 10668 counting only the distinct ones).

The product of its digits is 100800, while the sum is 36.

The square root of 55623447 is about 7458.1128310049. The cubic root of 55623447 is about 381.7267835189.

It can be divided in two parts, 5562 and 3447, that added together give a palindrome (9009).

The spelling of 55623447 in words is "fifty-five million, six hundred twenty-three thousand, four hundred forty-seven".