203432321161 has 2 divisors, whose sum is σ = 203432321162. Its totient is φ = 203432321160.

The previous prime is 203432321129. The next prime is 203432321177. The reversal of 203432321161 is 161123234302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177818239225 + 25614081936 = 421685^2 + 160044^2 .

It is a cyclic number.

It is not a de Polignac number, because 203432321161 - 2⁵ = 203432321129 is a prime.

It is not a weakly prime, because it can be changed into another prime (203432328161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101716160580 + 101716160581.

It is an arithmetic number, because the mean of its divisors is an integer number (101716160581).

Almost surely, 2^203432321161 is an apocalyptic number.

It is an amenable number.

203432321161 is a deficient number, since it is larger than the sum of its proper divisors (1).

203432321161 is an equidigital number, since it uses as much as digits as its factorization.

203432321161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 203432321161 its reverse (161123234302), we get a palindrome (364555555463).

The spelling of 203432321161 in words is "two hundred three billion, four hundred thirty-two million, three hundred twenty-one thousand, one hundred sixty-one".