55471687 has 2 divisors, whose sum is σ = 55471688. Its totient is φ = 55471686.

The previous prime is 55471649. The next prime is 55471709. The reversal of 55471687 is 78617455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55471687 - 2¹¹ = 55469639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55471627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27735843 + 27735844.

It is an arithmetic number, because the mean of its divisors is an integer number (27735844).

Almost surely, 2^55471687 is an apocalyptic number.

55471687 is a deficient number, since it is larger than the sum of its proper divisors (1).

55471687 is an equidigital number, since it uses as much as digits as its factorization.

55471687 is an odious number, because the sum of its binary digits is odd.

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

The square root of 55471687 is about 7447.9317263251. The cubic root of 55471687 is about 381.3793064211.

The spelling of 55471687 in words is "fifty-five million, four hundred seventy-one thousand, six hundred eighty-seven".