22153217 has 2 divisors, whose sum is σ = 22153218. Its totient is φ = 22153216.

The previous prime is 22153199. The next prime is 22153223. The reversal of 22153217 is 71235122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20421361 + 1731856 = 4519^2 + 1316^2 .

It is a cyclic number.

It is not a de Polignac number, because 22153217 - 2¹² = 22149121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22153192 and 22153201.

It is not a weakly prime, because it can be changed into another prime (22153247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11076608 + 11076609.

It is an arithmetic number, because the mean of its divisors is an integer number (11076609).

Almost surely, 2^22153217 is an apocalyptic number.

It is an amenable number.

22153217 is a deficient number, since it is larger than the sum of its proper divisors (1).

22153217 is an equidigital number, since it uses as much as digits as its factorization.

22153217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 23.

The square root of 22153217 is about 4706.7204080973. The cubic root of 22153217 is about 280.8529137397.

Adding to 22153217 its reverse (71235122), we get a palindrome (93388339).

The spelling of 22153217 in words is "twenty-two million, one hundred fifty-three thousand, two hundred seventeen".