22207897 has 2 divisors, whose sum is σ = 22207898. Its totient is φ = 22207896.

The previous prime is 22207853. The next prime is 22207919. The reversal of 22207897 is 79870222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13111641 + 9096256 = 3621^2 + 3016^2 .

It is a cyclic number.

It is not a de Polignac number, because 22207897 - 2¹¹ = 22205849 is a prime.

It is not a weakly prime, because it can be changed into another prime (22207817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11103948 + 11103949.

It is an arithmetic number, because the mean of its divisors is an integer number (11103949).

Almost surely, 2^22207897 is an apocalyptic number.

It is an amenable number.

22207897 is a deficient number, since it is larger than the sum of its proper divisors (1).

22207897 is an equidigital number, since it uses as much as digits as its factorization.

22207897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 22207897 is about 4712.5255436973. The cubic root of 22207897 is about 281.0837969796.

It can be divided in two parts, 22207 and 897, that added together give a square (23104 = 152²).

The spelling of 22207897 in words is "twenty-two million, two hundred seven thousand, eight hundred ninety-seven".