606523221 has 10 divisors (see below), whose sum is σ = 906040982. Its totient is φ = 404348760.

The previous prime is 606523207. The next prime is 606523223. The reversal of 606523221 is 122325606.

606523221 is a `hidden beast` number, since 6 + 0 + 652 + 3 + 2 + 2 + 1 = 666.

606523221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 599711121 + 6812100 = 24489^2 + 2610^2 .

It is not a de Polignac number, because 606523221 - 2⁶ = 606523157 is a prime.

It is a super-2 number, since 2×606523221² = 735740835224429682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (606523223) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3743890 + ... + 3744051.

Almost surely, 2^606523221 is an apocalyptic number.

It is an amenable number.

606523221 is a deficient number, since it is larger than the sum of its proper divisors (299517761).

606523221 is an equidigital number, since it uses as much as digits as its factorization.

606523221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7487953 (or 7487944 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 606523221 is about 24627.6921574069. The cubic root of 606523221 is about 846.4782643565.

Adding to 606523221 its reverse (122325606), we get a palindrome (728848827).

The spelling of 606523221 in words is "six hundred six million, five hundred twenty-three thousand, two hundred twenty-one".