551431 has 4 divisors (see below), whose sum is σ = 556600. Its totient is φ = 546264.

The previous prime is 551423. The next prime is 551443. The reversal of 551431 is 134155.

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 551431 - 2³ = 551423 is a prime.

It is a super-2 number, since 2×551431² = 608152295522, which contains 22 as substring.

It is a Duffinian number.

551431 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 551399 and 551408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551461) 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, 2421 + ... + 2638.

It is an arithmetic number, because the mean of its divisors is an integer number (139150).

2⁵⁵¹⁴³¹ is an apocalyptic number.

551431 is a deficient number, since it is larger than the sum of its proper divisors (5169).

551431 is a wasteful number, since it uses less digits than its factorization.

551431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5168.

The product of its digits is 300, while the sum is 19.

The square root of 551431 is about 742.5840019823. The cubic root of 551431 is about 82.0031230220.

Adding to 551431 its reverse (134155), we get a palindrome (685586).

The spelling of 551431 in words is "five hundred fifty-one thousand, four hundred thirty-one".