551101321 has 4 divisors (see below), whose sum is σ = 575062272. Its totient is φ = 527140372.

The previous prime is 551101307. The next prime is 551101333. The reversal of 551101321 is 123101155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 551101321 - 2¹¹ = 551099273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551101021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11980441 + ... + 11980486.

It is an arithmetic number, because the mean of its divisors is an integer number (143765568).

Almost surely, 2^551101321 is an apocalyptic number.

It is an amenable number.

551101321 is a deficient number, since it is larger than the sum of its proper divisors (23960951).

551101321 is a wasteful number, since it uses less digits than its factorization.

551101321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23960950.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 551101321 is about 23475.5472992644. The cubic root of 551101321 is about 819.8677761222.

Adding to 551101321 its reverse (123101155), we get a palindrome (674202476).

The spelling of 551101321 in words is "five hundred fifty-one million, one hundred one thousand, three hundred twenty-one".