633113221 has 4 divisors (see below), whose sum is σ = 681814252. Its totient is φ = 584412192.

The previous prime is 633113207. The next prime is 633113227. The reversal of 633113221 is 122311336.

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 305865121 + 327248100 = 17489^2 + 18090^2 .

It is not a de Polignac number, because 633113221 - 2¹¹ = 633111173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 633113192 and 633113201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633113227) 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, 24350496 + ... + 24350521.

It is an arithmetic number, because the mean of its divisors is an integer number (170453563).

Almost surely, 2^633113221 is an apocalyptic number.

It is an amenable number.

633113221 is a deficient number, since it is larger than the sum of its proper divisors (48701031).

633113221 is a wasteful number, since it uses less digits than its factorization.

633113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48701030.

The product of its digits is 648, while the sum is 22.

The square root of 633113221 is about 25161.7412155836. The cubic root of 633113221 is about 858.6716562743.

Adding to 633113221 its reverse (122311336), we get a palindrome (755424557).

The spelling of 633113221 in words is "six hundred thirty-three million, one hundred thirteen thousand, two hundred twenty-one".