551251321 has 8 divisors (see below), whose sum is σ = 556502400. Its totient is φ = 546021600.

The previous prime is 551251307. The next prime is 551251361. The reversal of 551251321 is 123152155.

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 551251321 - 2⁹ = 551250809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551251361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49125 + ... + 59293.

It is an arithmetic number, because the mean of its divisors is an integer number (69562800).

Almost surely, 2^551251321 is an apocalyptic number.

It is an amenable number.

551251321 is a deficient number, since it is larger than the sum of its proper divisors (5251079).

551251321 is a wasteful number, since it uses less digits than its factorization.

551251321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10679.

The product of its digits is 1500, while the sum is 25.

The square root of 551251321 is about 23478.7418955957. The cubic root of 551251321 is about 819.9421538611.

The spelling of 551251321 in words is "five hundred fifty-one million, two hundred fifty-one thousand, three hundred twenty-one".