22031197 has 2 divisors, whose sum is σ = 22031198. Its totient is φ = 22031196.

The previous prime is 22031159. The next prime is 22031209. The reversal of 22031197 is 79113022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12916836 + 9114361 = 3594^2 + 3019^2 .

It is a cyclic number.

It is not a de Polignac number, because 22031197 - 2⁷ = 22031069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22031137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11015598 + 11015599.

It is an arithmetic number, because the mean of its divisors is an integer number (11015599).

Almost surely, 2^22031197 is an apocalyptic number.

It is an amenable number.

22031197 is a deficient number, since it is larger than the sum of its proper divisors (1).

22031197 is an equidigital number, since it uses as much as digits as its factorization.

22031197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 22031197 is about 4693.7401930657. The cubic root of 22031197 is about 280.3363178139.

The spelling of 22031197 in words is "twenty-two million, thirty-one thousand, one hundred ninety-seven".