551101330521 has 18 divisors (see below), whose sum is σ = 926000195562. Its totient is φ = 314915045760.

The previous prime is 551101330487. The next prime is 551101330523. The reversal of 551101330521 is 125033101155.

551101330521 is a `hidden beast` number, since 5 + 5 + 1 + 1 + 0 + 133 + 0 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 386151630921 + 164949699600 = 621411^2 + 406140^2 .

It is not a de Polignac number, because 551101330521 - 2¹³ = 551101322329 is a prime.

It is a super-2 number, since 2×551101330521² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (551101330523) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 624831000 + ... + 624831881.

It is an arithmetic number, because the mean of its divisors is an integer number (51444455309).

Almost surely, 2^551101330521 is an apocalyptic number.

It is an amenable number.

551101330521 is a deficient number, since it is larger than the sum of its proper divisors (374898865041).

551101330521 is a wasteful number, since it uses less digits than its factorization.

551101330521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249662901 (or 1249662891 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

Adding to 551101330521 its reverse (125033101155), we get a palindrome (676134431676).

The spelling of 551101330521 in words is "five hundred fifty-one billion, one hundred one million, three hundred thirty thousand, five hundred twenty-one".