22898221 has 2 divisors, whose sum is σ = 22898222. Its totient is φ = 22898220.

The previous prime is 22898219. The next prime is 22898233. The reversal of 22898221 is 12289822.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16112196 + 6786025 = 4014^2 + 2605^2 .

It is a cyclic number.

It is not a de Polignac number, because 22898221 - 2¹ = 22898219 is a prime.

Together with 22898219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22898251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11449110 + 11449111.

It is an arithmetic number, because the mean of its divisors is an integer number (11449111).

Almost surely, 2^22898221 is an apocalyptic number.

It is an amenable number.

22898221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22898221 is an equidigital number, since it uses as much as digits as its factorization.

22898221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 34.

The square root of 22898221 is about 4785.2085638977. The cubic root of 22898221 is about 283.9665908263.

The spelling of 22898221 in words is "twenty-two million, eight hundred ninety-eight thousand, two hundred twenty-one".