551740 has 36 divisors (see below), whose sum is σ = 1350216. Its totient is φ = 188832.

The previous prime is 551731. The next prime is 551743. The reversal of 551740 is 47155.

551740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 699 + ... + 1261.

It is an arithmetic number, because the mean of its divisors is an integer number (37506).

2⁵⁵¹⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (675108).

551740 is an abundant number, since it is smaller than the sum of its proper divisors (798476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551740 is a wasteful number, since it uses less digits than its factorization.

551740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 551740 is about 742.7920301134. The cubic root of 551740 is about 82.0184372581.

Adding to 551740 its reverse (47155), we get a palindrome (598895).

The spelling of 551740 in words is "five hundred fifty-one thousand, seven hundred forty".