5205551 has 8 divisors (see below), whose sum is σ = 5787264. Its totient is φ = 4649760.

The previous prime is 5205539. The next prime is 5205583. The reversal of 5205551 is 1555025.

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 5205551 - 2¹⁰ = 5204527 is a prime.

It is a super-3 number, since 3×5205551³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205251) 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, 6056 + ... + 6861.

It is an arithmetic number, because the mean of its divisors is an integer number (723408).

Almost surely, 2^5205551 is an apocalyptic number.

5205551 is a deficient number, since it is larger than the sum of its proper divisors (581713).

5205551 is a wasteful number, since it uses less digits than its factorization.

5205551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12961.

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 5205551 is about 2281.5676628143. The cubic root of 5205551 is about 173.3094464947.

The spelling of 5205551 in words is "five million, two hundred five thousand, five hundred fifty-one".