55247997 has 8 divisors (see below), whose sum is σ = 84187456. Its totient is φ = 31570272.

The previous prime is 55247981. The next prime is 55248023. The reversal of 55247997 is 79974255.

55247997 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 not a de Polignac number, because 55247997 - 2⁴ = 55247981 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 (55247947) 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, 1315408 + ... + 1315449.

It is an arithmetic number, because the mean of its divisors is an integer number (10523432).

Almost surely, 2^55247997 is an apocalyptic number.

It is an amenable number.

55247997 is a deficient number, since it is larger than the sum of its proper divisors (28939459).

55247997 is a wasteful number, since it uses less digits than its factorization.

55247997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630867.

The product of its digits is 793800, while the sum is 48.

The square root of 55247997 is about 7432.8996360774. The cubic root of 55247997 is about 380.8659774820.

The spelling of 55247997 in words is "fifty-five million, two hundred forty-seven thousand, nine hundred ninety-seven".