55214247 has 32 divisors (see below), whose sum is σ = 85432320. Its totient is φ = 31367520.

The previous prime is 55214239. The next prime is 55214251. The reversal of 55214247 is 74241255.

It is not a de Polignac number, because 55214247 - 2³ = 55214239 is a prime.

It is a super-2 number, since 2×55214247² = 6097226143554018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55214297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66678 + ... + 67500.

It is an arithmetic number, because the mean of its divisors is an integer number (2669760).

Almost surely, 2^55214247 is an apocalyptic number.

55214247 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

55214247 is a deficient number, since it is larger than the sum of its proper divisors (30218073).

55214247 is a wasteful number, since it uses less digits than its factorization.

55214247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963.

The product of its digits is 11200, while the sum is 30.

The square root of 55214247 is about 7430.6289774150. The cubic root of 55214247 is about 380.7884069769.

The spelling of 55214247 in words is "fifty-five million, two hundred fourteen thousand, two hundred forty-seven".