551973 has 16 divisors (see below), whose sum is σ = 794880. Its totient is φ = 339456.

The previous prime is 551963. The next prime is 551981. The reversal of 551973 is 379155.

It is a happy number.

It is not a de Polignac number, because 551973 - 2⁶ = 551909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3961 + ... + 4097.

It is an arithmetic number, because the mean of its divisors is an integer number (49680).

2⁵⁵¹⁹⁷³ is an apocalyptic number.

It is an amenable number.

551973 is a deficient number, since it is larger than the sum of its proper divisors (242907).

551973 is a wasteful number, since it uses less digits than its factorization.

551973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236.

The product of its digits is 4725, while the sum is 30.

The square root of 551973 is about 742.9488542289. The cubic root of 551973 is about 82.0299811051.

The spelling of 551973 in words is "five hundred fifty-one thousand, nine hundred seventy-three".