551487 has 4 divisors (see below), whose sum is σ = 735320. Its totient is φ = 367656.

The previous prime is 551483. The next prime is 551489. The reversal of 551487 is 784155.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 551487 - 2² = 551483 is a prime.

It is a super-2 number, since 2×551487² = 608275822338, which contains 22 as substring.

It is a D-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 (551483) 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 3 ways as a sum of consecutive naturals, for example, 91912 + ... + 91917.

It is an arithmetic number, because the mean of its divisors is an integer number (183830).

2⁵⁵¹⁴⁸⁷ is an apocalyptic number.

551487 is a deficient number, since it is larger than the sum of its proper divisors (183833).

551487 is a wasteful number, since it uses less digits than its factorization.

551487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183832.

The product of its digits is 5600, while the sum is 30.

The square root of 551487 is about 742.6217071969. The cubic root of 551487 is about 82.0058988420.

It can be divided in two parts, 55148 and 7, that added together give a palindrome (55155).

The spelling of 551487 in words is "five hundred fifty-one thousand, four hundred eighty-seven".