731479221 has 32 divisors (see below), whose sum is σ = 1185744000. Its totient is φ = 441987840.

The previous prime is 731479219. The next prime is 731479253. The reversal of 731479221 is 122974137.

It is not a de Polignac number, because 731479221 - 2¹ = 731479219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731479261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100125 + ... + 107181.

It is an arithmetic number, because the mean of its divisors is an integer number (37054500).

Almost surely, 2^731479221 is an apocalyptic number.

It is an amenable number.

731479221 is a deficient number, since it is larger than the sum of its proper divisors (454264779).

731479221 is a wasteful number, since it uses less digits than its factorization.

731479221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7426 (or 7420 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 731479221 is about 27045.8725316822. The cubic root of 731479221 is about 901.0191011565.

The spelling of 731479221 in words is "seven hundred thirty-one million, four hundred seventy-nine thousand, two hundred twenty-one".