55686247 has 8 divisors (see below), whose sum is σ = 57508880. Its totient is φ = 53892216.

The previous prime is 55686209. The next prime is 55686251. The reversal of 55686247 is 74268655.

It is not a de Polignac number, because 55686247 - 2¹¹ = 55684199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55686347) 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, 510829 + ... + 510937.

It is an arithmetic number, because the mean of its divisors is an integer number (7188610).

Almost surely, 2^55686247 is an apocalyptic number.

55686247 is a deficient number, since it is larger than the sum of its proper divisors (1822633).

55686247 is an frugal number, since it uses more digits than its factorization.

55686247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 152 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The square root of 55686247 is about 7462.3218236686. The cubic root of 55686247 is about 381.8703885822.

55686247 divided by its sum of digits (43) gives a cube (1295029 = 109³).

The spelling of 55686247 in words is "fifty-five million, six hundred eighty-six thousand, two hundred forty-seven".