551251 has 4 divisors (see below), whose sum is σ = 557032. Its totient is φ = 545472.

The previous prime is 551233. The next prime is 551269. The reversal of 551251 is 152155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152155 = 5 ⋅30431.

It is an interprime number because it is at equal distance from previous prime (551233) and next prime (551269).

It is a cyclic number.

It is not a de Polignac number, because 551251 - 2⁵ = 551219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551231) 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, 2745 + ... + 2938.

It is an arithmetic number, because the mean of its divisors is an integer number (139258).

2⁵⁵¹²⁵¹ is an apocalyptic number.

551251 is a deficient number, since it is larger than the sum of its proper divisors (5781).

551251 is an equidigital number, since it uses as much as digits as its factorization.

551251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5780.

The product of its digits is 250, while the sum is 19.

The square root of 551251 is about 742.4627936806. The cubic root of 551251 is about 81.9941994707.

The spelling of 551251 in words is "five hundred fifty-one thousand, two hundred fifty-one".