356604221 has 4 divisors (see below), whose sum is σ = 360611100. Its totient is φ = 352597344.

The previous prime is 356604173. The next prime is 356604229. The reversal of 356604221 is 122406653.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 212868100 + 143736121 = 14590^2 + 11989^2 .

It is a cyclic number.

It is not a de Polignac number, because 356604221 - 2¹⁰ = 356603197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (356604229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2003306 + ... + 2003483.

It is an arithmetic number, because the mean of its divisors is an integer number (90152775).

Almost surely, 2^356604221 is an apocalyptic number.

It is an amenable number.

356604221 is a deficient number, since it is larger than the sum of its proper divisors (4006879).

356604221 is an equidigital number, since it uses as much as digits as its factorization.

356604221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4006878.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 356604221 is about 18883.9673003318. The cubic root of 356604221 is about 709.1348458376.

The spelling of 356604221 in words is "three hundred fifty-six million, six hundred four thousand, two hundred twenty-one".