551545 has 8 divisors (see below), whose sum is σ = 676224. Its totient is φ = 431664.

The previous prime is 551543. The next prime is 551549. The reversal of 551545 is 545155.

551545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 551545 - 2¹ = 551543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551543) 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, 939 + ... + 1408.

It is an arithmetic number, because the mean of its divisors is an integer number (84528).

2⁵⁵¹⁵⁴⁵ is an apocalyptic number.

551545 is the 470-th heptagonal number.

It is an amenable number.

551545 is a deficient number, since it is larger than the sum of its proper divisors (124679).

551545 is a wasteful number, since it uses less digits than its factorization.

551545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2399.

The product of its digits is 2500, while the sum is 25.

The square root of 551545 is about 742.6607570082. The cubic root of 551545 is about 82.0087736002.

It can be divided in two parts, 55 and 1545, that added together give a square (1600 = 40²).

The spelling of 551545 in words is "five hundred fifty-one thousand, five hundred forty-five".