744180221 has 8 divisors (see below), whose sum is σ = 752128824. Its totient is φ = 736243200.

The previous prime is 744180197. The next prime is 744180247. The reversal of 744180221 is 122081447.

It can be written as a sum of positive squares in 4 ways, for example, as 213568996 + 530611225 = 14614^2 + 23035^2 .

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 744180221 - 2¹⁴ = 744163837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744180421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199445 + ... + 203141.

It is an arithmetic number, because the mean of its divisors is an integer number (94016103).

Almost surely, 2^744180221 is an apocalyptic number.

It is an amenable number.

744180221 is a deficient number, since it is larger than the sum of its proper divisors (7948603).

744180221 is a wasteful number, since it uses less digits than its factorization.

744180221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5791.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 744180221 is about 27279.6668051499. Note that the first 3 decimals coincide. The cubic root of 744180221 is about 906.2041381088.

The spelling of 744180221 in words is "seven hundred forty-four million, one hundred eighty thousand, two hundred twenty-one".