55624247 has 4 divisors (see below), whose sum is σ = 63570576. Its totient is φ = 47677920.

The previous prime is 55624243. The next prime is 55624259. The reversal of 55624247 is 74242655.

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

It is a cyclic number.

It is not a de Polignac number, because 55624247 - 2² = 55624243 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 (55624243) 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, 3973154 + ... + 3973167.

It is an arithmetic number, because the mean of its divisors is an integer number (15892644).

Almost surely, 2^55624247 is an apocalyptic number.

55624247 is a deficient number, since it is larger than the sum of its proper divisors (7946329).

55624247 is an equidigital number, since it uses as much as digits as its factorization.

55624247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7946328.

The product of its digits is 67200, while the sum is 35.

The square root of 55624247 is about 7458.1664636826. The cubic root of 55624247 is about 381.7286135623.

The spelling of 55624247 in words is "fifty-five million, six hundred twenty-four thousand, two hundred forty-seven".