2142231997 has 2 divisors, whose sum is σ = 2142231998. Its totient is φ = 2142231996.

The previous prime is 2142231989. The next prime is 2142232009. The reversal of 2142231997 is 7991322412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1844358916 + 297873081 = 42946^2 + 17259^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142231997 - 2³ = 2142231989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2142231907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071115998 + 1071115999.

It is an arithmetic number, because the mean of its divisors is an integer number (1071115999).

Almost surely, 2^2142231997 is an apocalyptic number.

It is an amenable number.

2142231997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142231997 is an equidigital number, since it uses as much as digits as its factorization.

2142231997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 2142231997 is about 46284.2521490841. The cubic root of 2142231997 is about 1289.1066059454.

The spelling of 2142231997 in words is "two billion, one hundred forty-two million, two hundred thirty-one thousand, nine hundred ninety-seven".