55505487 has 8 divisors (see below), whose sum is σ = 74662704. Its totient is φ = 36675968.

The previous prime is 55505419. The next prime is 55505491. The reversal of 55505487 is 78450555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55505487 - 2¹⁴ = 55489103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505497) 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, 81528 + ... + 82205.

It is an arithmetic number, because the mean of its divisors is an integer number (9332838).

Almost surely, 2^55505487 is an apocalyptic number.

55505487 is a deficient number, since it is larger than the sum of its proper divisors (19157217).

55505487 is a wasteful number, since it uses less digits than its factorization.

55505487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163849.

The product of its (nonzero) digits is 140000, while the sum is 39.

The square root of 55505487 is about 7450.2004671015. The cubic root of 55505487 is about 381.4567513542.

It can be divided in two parts, 5550548 and 7, that added together give a palindrome (5550555).

The spelling of 55505487 in words is "fifty-five million, five hundred five thousand, four hundred eighty-seven".