55501287 has 8 divisors (see below), whose sum is σ = 74046336. Its totient is φ = 36978552.

The previous prime is 55501267. The next prime is 55501289. The reversal of 55501287 is 78210555.

It is a happy number.

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

It is not a de Polignac number, because 55501287 - 2¹² = 55497191 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55501289) 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, 1518 + ... + 10644.

It is an arithmetic number, because the mean of its divisors is an integer number (9255792).

Almost surely, 2^55501287 is an apocalyptic number.

55501287 is a deficient number, since it is larger than the sum of its proper divisors (18545049).

55501287 is a wasteful number, since it uses less digits than its factorization.

55501287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11157.

The product of its (nonzero) digits is 14000, while the sum is 33.

The square root of 55501287 is about 7449.9185901592. The cubic root of 55501287 is about 381.4471297303.

The spelling of 55501287 in words is "fifty-five million, five hundred one thousand, two hundred eighty-seven".