733221 has 12 divisors (see below), whose sum is σ = 1066572. Its totient is φ = 485376.

The previous prime is 733189. The next prime is 733237. The reversal of 733221 is 122337.

It can be written as a sum of positive squares in 2 ways, for example, as 408321 + 324900 = 639^2 + 570^2 .

It is not a de Polignac number, because 733221 - 2⁵ = 733189 is a prime.

It is a super-2 number, since 2×733221² = 1075226069682, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 733194 and 733203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (733241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2155 + ... + 2471.

It is an arithmetic number, because the mean of its divisors is an integer number (88881).

2⁷³³²²¹ is an apocalyptic number.

It is an amenable number.

733221 is a deficient number, since it is larger than the sum of its proper divisors (333351).

733221 is a wasteful number, since it uses less digits than its factorization.

733221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 577 counting only the distinct ones).

The product of its digits is 252, while the sum is 18.

The square root of 733221 is about 856.2832475297. The cubic root of 733221 is about 90.1733695227.

Adding to 733221 its reverse (122337), we get a palindrome (855558).

The spelling of 733221 in words is "seven hundred thirty-three thousand, two hundred twenty-one".