551947 has 4 divisors (see below), whose sum is σ = 602136. Its totient is φ = 501760.

The previous prime is 551933. The next prime is 551951. The reversal of 551947 is 749155.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551947 is a prime.

It is a Duffinian number.

551947 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (551917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25078 + ... + 25099.

It is an arithmetic number, because the mean of its divisors is an integer number (150534).

2⁵⁵¹⁹⁴⁷ is an apocalyptic number.

551947 is a deficient number, since it is larger than the sum of its proper divisors (50189).

551947 is a wasteful number, since it uses less digits than its factorization.

551947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50188.

The product of its digits is 6300, while the sum is 31.

The square root of 551947 is about 742.9313561831. The cubic root of 551947 is about 82.0286931115.

It can be divided in two parts, 55 and 1947, that added together give a palindrome (2002).

The spelling of 551947 in words is "five hundred fifty-one thousand, nine hundred forty-seven".