551427 has 4 divisors (see below), whose sum is σ = 735240. Its totient is φ = 367616.

The previous prime is 551423. The next prime is 551443. The reversal of 551427 is 724155.

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

It is a cyclic number.

It is not a de Polignac number, because 551427 - 2² = 551423 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 551397 and 551406.

It is not an unprimeable number, because it can be changed into a prime (551423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91902 + ... + 91907.

It is an arithmetic number, because the mean of its divisors is an integer number (183810).

2⁵⁵¹⁴²⁷ is an apocalyptic number.

551427 is a deficient number, since it is larger than the sum of its proper divisors (183813).

551427 is a wasteful number, since it uses less digits than its factorization.

551427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183812.

The product of its digits is 1400, while the sum is 24.

The square root of 551427 is about 742.5813086794. The cubic root of 551427 is about 82.0029247420.

The spelling of 551427 in words is "five hundred fifty-one thousand, four hundred twenty-seven".