197231101 has 2 divisors, whose sum is σ = 197231102. Its totient is φ = 197231100.

The previous prime is 197231071. The next prime is 197231107. The reversal of 197231101 is 101132791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118483225 + 78747876 = 10885^2 + 8874^2 .

It is an emirp because it is prime and its reverse (101132791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197231101 - 2¹⁵ = 197198333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197231107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98615550 + 98615551.

It is an arithmetic number, because the mean of its divisors is an integer number (98615551).

Almost surely, 2^197231101 is an apocalyptic number.

It is an amenable number.

197231101 is a deficient number, since it is larger than the sum of its proper divisors (1).

197231101 is an equidigital number, since it uses as much as digits as its factorization.

197231101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 197231101 is about 14043.8990668546. The cubic root of 197231101 is about 582.0922266586.

Adding to 197231101 its reverse (101132791), we get a palindrome (298363892).

The spelling of 197231101 in words is "one hundred ninety-seven million, two hundred thirty-one thousand, one hundred one".