55071247 has 24 divisors (see below), whose sum is σ = 70785792. Its totient is φ = 42361200.

The previous prime is 55071239. The next prime is 55071251. The reversal of 55071247 is 74217055.

It is not a de Polignac number, because 55071247 - 2³ = 55071239 is a prime.

It is a super-2 number, since 2×55071247² = 6065684492270018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55071257) 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 23 ways as a sum of consecutive naturals, for example, 44122 + ... + 45352.

It is an arithmetic number, because the mean of its divisors is an integer number (2949408).

Almost surely, 2^55071247 is an apocalyptic number.

55071247 is a deficient number, since it is larger than the sum of its proper divisors (15714545).

55071247 is a wasteful number, since it uses less digits than its factorization.

55071247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339 (or 1332 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 55071247 is about 7421.0004042582. Note that the first 3 decimals coincide. The cubic root of 55071247 is about 380.4593867079.

The spelling of 55071247 in words is "fifty-five million, seventy-one thousand, two hundred forty-seven".