551969 has 12 divisors (see below), whose sum is σ = 640080. Its totient is φ = 471960.

The previous prime is 551963. The next prime is 551981. The reversal of 551969 is 969155.

It is not a de Polignac number, because 551969 - 2⁸ = 551713 is a prime.

It is a super-2 number, since 2×551969² = 609339553922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551963) 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 11 ways as a sum of consecutive naturals, for example, 3902 + ... + 4040.

It is an arithmetic number, because the mean of its divisors is an integer number (53340).

2⁵⁵¹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

551969 is a deficient number, since it is larger than the sum of its proper divisors (88111).

551969 is a wasteful number, since it uses less digits than its factorization.

551969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 169 counting only the distinct ones).

The product of its digits is 12150, while the sum is 35.

The square root of 551969 is about 742.9461622487. The cubic root of 551969 is about 82.0297829549.

The spelling of 551969 in words is "five hundred fifty-one thousand, nine hundred sixty-nine".