4512751221 has 8 divisors (see below), whose sum is σ = 6564001824. Its totient is φ = 2735000720.

The previous prime is 4512751211. The next prime is 4512751241. The reversal of 4512751221 is 1221572154.

It is a happy number.

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 4512751221 - 2¹⁷ = 4512620149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4512751211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68374986 + ... + 68375051.

It is an arithmetic number, because the mean of its divisors is an integer number (820500228).

Almost surely, 2^4512751221 is an apocalyptic number.

It is an amenable number.

4512751221 is a deficient number, since it is larger than the sum of its proper divisors (2051250603).

4512751221 is a wasteful number, since it uses less digits than its factorization.

4512751221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136750051.

The product of its digits is 5600, while the sum is 30.

The square root of 4512751221 is about 67177.0140821993. The cubic root of 4512751221 is about 1652.5215466043.

The spelling of 4512751221 in words is "four billion, five hundred twelve million, seven hundred fifty-one thousand, two hundred twenty-one".