5287221 has 16 divisors (see below), whose sum is σ = 8294400. Its totient is φ = 3317184.

The previous prime is 5287213. The next prime is 5287229. The reversal of 5287221 is 1227825.

5287221 = 94² + 95² + ... + 255².

It is an interprime number because it is at equal distance from previous prime (5287213) and next prime (5287229).

It is not a de Polignac number, because 5287221 - 2³ = 5287213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 5⁵ + 2¹² + 8 + 7⁷ + 2¹⁸ + 2²² + 1 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5287229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5301 + ... + 6218.

It is an arithmetic number, because the mean of its divisors is an integer number (518400).

Almost surely, 2^5287221 is an apocalyptic number.

5287221 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

5287221 is a deficient number, since it is larger than the sum of its proper divisors (3007179).

5287221 is a wasteful number, since it uses less digits than its factorization.

5287221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11545 (or 11539 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 5287221 is about 2299.3957902023. The cubic root of 5287221 is about 174.2110993168.

The spelling of 5287221 in words is "five million, two hundred eighty-seven thousand, two hundred twenty-one".