513221112 has 24 divisors (see below), whose sum is σ = 1389974040. Its totient is φ = 171073680.

The previous prime is 513221077. The next prime is 513221119. The reversal of 513221112 is 211122315.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×513221112³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513221119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3563964 + ... + 3564107.

It is an arithmetic number, because the mean of its divisors is an integer number (57915585).

Almost surely, 2^513221112 is an apocalyptic number.

It is an amenable number.

513221112 is an abundant number, since it is smaller than the sum of its proper divisors (876752928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513221112 is a wasteful number, since it uses less digits than its factorization.

513221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7128083 (or 7128076 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 513221112 is about 22654.3839466007. The cubic root of 513221112 is about 800.6354908888.

Adding to 513221112 its reverse (211122315), we get a palindrome (724343427).

It can be divided in two parts, 5132 and 21112, that added together give a square (26244 = 162²).

The spelling of 513221112 in words is "five hundred thirteen million, two hundred twenty-one thousand, one hundred twelve".