511221105 has 32 divisors (see below), whose sum is σ = 912117120. Its totient is φ = 271667520.

The previous prime is 511221103. The next prime is 511221131. The reversal of 511221105 is 501122115.

It is not a de Polignac number, because 511221105 - 2¹ = 511221103 is a prime.

It is a super-4 number, since 4×511221105⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (511221103) 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 31 ways as a sum of consecutive naturals, for example, 31515 + ... + 44895.

It is an arithmetic number, because the mean of its divisors is an integer number (28503660).

Almost surely, 2^511221105 is an apocalyptic number.

It is an amenable number.

511221105 is a deficient number, since it is larger than the sum of its proper divisors (400896015).

511221105 is a wasteful number, since it uses less digits than its factorization.

511221105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13678 (or 13672 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 511221105 is about 22610.1991366728. The cubic root of 511221105 is about 799.5941196321.

It can be divided in two parts, 51122110 and 5, that added together give a palindrome (51122115).

The spelling of 511221105 in words is "five hundred eleven million, two hundred twenty-one thousand, one hundred five".