55668247 has 4 divisors (see below), whose sum is σ = 55721680. Its totient is φ = 55614816.

The previous prime is 55668241. The next prime is 55668253. The reversal of 55668247 is 74286655.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (55668241) and next prime (55668253).

It is a cyclic number.

It is not a de Polignac number, because 55668247 - 2¹¹ = 55666199 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 (55668241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25122 + ... + 27247.

It is an arithmetic number, because the mean of its divisors is an integer number (13930420).

Almost surely, 2^55668247 is an apocalyptic number.

55668247 is a deficient number, since it is larger than the sum of its proper divisors (53433).

55668247 is a wasteful number, since it uses less digits than its factorization.

55668247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53432.

The product of its digits is 403200, while the sum is 43.

The square root of 55668247 is about 7461.1156672444. The cubic root of 55668247 is about 381.8292389380.

The spelling of 55668247 in words is "fifty-five million, six hundred sixty-eight thousand, two hundred forty-seven".