551645317 has 8 divisors (see below), whose sum is σ = 575942400. Its totient is φ = 527374320.

The previous prime is 551645309. The next prime is 551645357. The reversal of 551645317 is 713546155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 551645317 - 2³ = 551645309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551645357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45684 + ... + 56482.

It is an arithmetic number, because the mean of its divisors is an integer number (71992800).

Almost surely, 2^551645317 is an apocalyptic number.

It is an amenable number.

551645317 is a deficient number, since it is larger than the sum of its proper divisors (24297083).

551645317 is a wasteful number, since it uses less digits than its factorization.

551645317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13043.

The product of its digits is 63000, while the sum is 37.

The square root of 551645317 is about 23487.1308805482. The cubic root of 551645317 is about 820.1374531627.

The spelling of 551645317 in words is "five hundred fifty-one million, six hundred forty-five thousand, three hundred seventeen".