55972247 has 8 divisors (see below), whose sum is σ = 56563920. Its totient is φ = 55384000.

The previous prime is 55972243. The next prime is 55972277. The reversal of 55972247 is 74227955.

55972247 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 a cyclic number.

It is not a de Polignac number, because 55972247 - 2² = 55972243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55972243) 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 7 ways as a sum of consecutive naturals, for example, 42779 + ... + 44067.

It is an arithmetic number, because the mean of its divisors is an integer number (7070490).

Almost surely, 2^55972247 is an apocalyptic number.

55972247 is a deficient number, since it is larger than the sum of its proper divisors (591673).

55972247 is a wasteful number, since it uses less digits than its factorization.

55972247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713.

The product of its digits is 176400, while the sum is 41.

The square root of 55972247 is about 7481.4602184333. The cubic root of 55972247 is about 382.5230242310.

The spelling of 55972247 in words is "fifty-five million, nine hundred seventy-two thousand, two hundred forty-seven".