55687471 has 24 divisors (see below), whose sum is σ = 67740624. Its totient is φ = 45601920.

The previous prime is 55687469. The next prime is 55687481. The reversal of 55687471 is 17478655.

It is not a de Polignac number, because 55687471 - 2¹ = 55687469 is a prime.

It is a super-3 number, since 3×55687471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55687481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106216 + ... + 106738.

It is an arithmetic number, because the mean of its divisors is an integer number (2822526).

Almost surely, 2^55687471 is an apocalyptic number.

55687471 is a deficient number, since it is larger than the sum of its proper divisors (12053153).

55687471 is a wasteful number, since it uses less digits than its factorization.

55687471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 624 counting only the distinct ones).

The product of its digits is 235200, while the sum is 43.

The square root of 55687471 is about 7462.4038352263. The cubic root of 55687471 is about 381.8731864359.

The spelling of 55687471 in words is "fifty-five million, six hundred eighty-seven thousand, four hundred seventy-one".