22215101 has 2 divisors, whose sum is σ = 22215102. Its totient is φ = 22215100.

The previous prime is 22215091. The next prime is 22215157. The reversal of 22215101 is 10151222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14784025 + 7431076 = 3845^2 + 2726^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22215101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22215001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11107550 + 11107551.

It is an arithmetic number, because the mean of its divisors is an integer number (11107551).

Almost surely, 2^22215101 is an apocalyptic number.

It is an amenable number.

22215101 is a deficient number, since it is larger than the sum of its proper divisors (1).

22215101 is an equidigital number, since it uses as much as digits as its factorization.

22215101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 22215101 is about 4713.2898277106. The cubic root of 22215101 is about 281.1141872016.

Adding to 22215101 its reverse (10151222), we get a palindrome (32366323).

The spelling of 22215101 in words is "twenty-two million, two hundred fifteen thousand, one hundred one".