551051 has 4 divisors (see below), whose sum is σ = 552552. Its totient is φ = 549552.

The previous prime is 551039. The next prime is 551059. The reversal of 551051 is 150155.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 551051 - 2¹⁰ = 550027 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551059) 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, 215 + ... + 1071.

It is an arithmetic number, because the mean of its divisors is an integer number (138138).

2⁵⁵¹⁰⁵¹ is an apocalyptic number.

551051 is a deficient number, since it is larger than the sum of its proper divisors (1501).

551051 is an equidigital number, since it uses as much as digits as its factorization.

551051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500.

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 551051 is about 742.3280945781. The cubic root of 551051 is about 81.9842821351.

It can be divided in two parts, 5 and 51051, that multiplied together give a triangular number (255255 = T₇₁₄).

The spelling of 551051 in words is "five hundred fifty-one thousand, fifty-one".