22133257 has 4 divisors (see below), whose sum is σ = 22203396. Its totient is φ = 22063120.

The previous prime is 22133203. The next prime is 22133263. The reversal of 22133257 is 75233122.

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 1666681 + 20466576 = 1291^2 + 4524^2 .

It is a cyclic number.

It is not a de Polignac number, because 22133257 - 2⁷ = 22133129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22133297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34594 + ... + 35227.

It is an arithmetic number, because the mean of its divisors is an integer number (5550849).

Almost surely, 2^22133257 is an apocalyptic number.

It is an amenable number.

22133257 is a deficient number, since it is larger than the sum of its proper divisors (70139).

22133257 is an equidigital number, since it uses as much as digits as its factorization.

22133257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70138.

The product of its digits is 2520, while the sum is 25.

The square root of 22133257 is about 4704.5995578795. The cubic root of 22133257 is about 280.7685391075.

Adding to 22133257 its reverse (75233122), we get a palindrome (97366379).

The spelling of 22133257 in words is "twenty-two million, one hundred thirty-three thousand, two hundred fifty-seven".