55311247 has 8 divisors (see below), whose sum is σ = 56459312. Its totient is φ = 54172800.

The previous prime is 55311239. The next prime is 55311253. The reversal of 55311247 is 74211355.

It is a happy number.

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 55311247 - 2³ = 55311239 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 (55311227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9847 + ... + 14407.

It is an arithmetic number, because the mean of its divisors is an integer number (7057414).

Almost surely, 2^55311247 is an apocalyptic number.

55311247 is a deficient number, since it is larger than the sum of its proper divisors (1148065).

55311247 is a wasteful number, since it uses less digits than its factorization.

55311247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4809.

The product of its digits is 4200, while the sum is 28.

The square root of 55311247 is about 7437.1531515762. The cubic root of 55311247 is about 381.0112653191.

The spelling of 55311247 in words is "fifty-five million, three hundred eleven thousand, two hundred forty-seven".