231642101 has 2 divisors, whose sum is σ = 231642102. Its totient is φ = 231642100.

The previous prime is 231642079. The next prime is 231642139. The reversal of 231642101 is 101246132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202492900 + 29149201 = 14230^2 + 5399^2 .

It is a cyclic number.

It is not a de Polignac number, because 231642101 - 2¹⁰ = 231641077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231642181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115821050 + 115821051.

It is an arithmetic number, because the mean of its divisors is an integer number (115821051).

Almost surely, 2^231642101 is an apocalyptic number.

It is an amenable number.

231642101 is a deficient number, since it is larger than the sum of its proper divisors (1).

231642101 is an equidigital number, since it uses as much as digits as its factorization.

231642101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 231642101 is about 15219.7930669244. The cubic root of 231642101 is about 614.1472315069.

Adding to 231642101 its reverse (101246132), we get a palindrome (332888233).

The spelling of 231642101 in words is "two hundred thirty-one million, six hundred forty-two thousand, one hundred one".