22152257 has 4 divisors (see below), whose sum is σ = 22257456. Its totient is φ = 22047060.

The previous prime is 22152239. The next prime is 22152281. The reversal of 22152257 is 75225122.

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 a de Polignac number, because none of the positive numbers 2^k-22152257 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (22152287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52283 + ... + 52704.

It is an arithmetic number, because the mean of its divisors is an integer number (5564364).

Almost surely, 2^22152257 is an apocalyptic number.

It is an amenable number.

22152257 is a deficient number, since it is larger than the sum of its proper divisors (105199).

22152257 is a wasteful number, since it uses less digits than its factorization.

22152257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105198.

The product of its digits is 2800, while the sum is 26.

The square root of 22152257 is about 4706.6184251541. The cubic root of 22152257 is about 280.8488568016.

Adding to 22152257 its reverse (75225122), we get a palindrome (97377379).

The spelling of 22152257 in words is "twenty-two million, one hundred fifty-two thousand, two hundred fifty-seven".