283136221 has 4 divisors (see below), whose sum is σ = 287935200. Its totient is φ = 278337244.

The previous prime is 283136179. The next prime is 283136261. The reversal of 283136221 is 122631382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 283136221 - 2²¹ = 281039069 is a prime.

It is a super-2 number, since 2×283136221² = 160332239284321682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 283136221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (283136261) 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, 2399401 + ... + 2399518.

It is an arithmetic number, because the mean of its divisors is an integer number (71983800).

Almost surely, 2^283136221 is an apocalyptic number.

It is an amenable number.

283136221 is a deficient number, since it is larger than the sum of its proper divisors (4798979).

283136221 is an equidigital number, since it uses as much as digits as its factorization.

283136221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4798978.

The product of its digits is 3456, while the sum is 28.

The square root of 283136221 is about 16826.6521031369. The cubic root of 283136221 is about 656.6467670998.

The spelling of 283136221 in words is "two hundred eighty-three million, one hundred thirty-six thousand, two hundred twenty-one".