551581943 has 16 divisors (see below), whose sum is σ = 623462400. Its totient is φ = 483379680.

The previous prime is 551581937. The next prime is 551581957. The reversal of 551581943 is 349185155.

551581943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 551581943 - 2⁸ = 551581687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551581943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551581963) 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, 312698 + ... + 314456.

It is an arithmetic number, because the mean of its divisors is an integer number (38966400).

Almost surely, 2^551581943 is an apocalyptic number.

551581943 is a deficient number, since it is larger than the sum of its proper divisors (71880457).

551581943 is a wasteful number, since it uses less digits than its factorization.

551581943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782.

The product of its digits is 108000, while the sum is 41.

The square root of 551581943 is about 23485.7817200109. The cubic root of 551581943 is about 820.1060456744.

The spelling of 551581943 in words is "five hundred fifty-one million, five hundred eighty-one thousand, nine hundred forty-three".