55357287 has 16 divisors (see below), whose sum is σ = 79227360. Its totient is φ = 34255872.

The previous prime is 55357273. The next prime is 55357301. The reversal of 55357287 is 78275355.

It is an interprime number because it is at equal distance from previous prime (55357273) and next prime (55357301).

It is not a de Polignac number, because 55357287 - 2¹⁰ = 55356263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55357787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3712 + ... + 11157.

It is an arithmetic number, because the mean of its divisors is an integer number (4951710).

Almost surely, 2^55357287 is an apocalyptic number.

55357287 is a deficient number, since it is larger than the sum of its proper divisors (23870073).

55357287 is a wasteful number, since it uses less digits than its factorization.

55357287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14962.

The product of its digits is 294000, while the sum is 42.

The square root of 55357287 is about 7440.2477781321. The cubic root of 55357287 is about 381.1169514421.

The spelling of 55357287 in words is "fifty-five million, three hundred fifty-seven thousand, two hundred eighty-seven".