42015032161 has 2 divisors, whose sum is σ = 42015032162. Its totient is φ = 42015032160.

The previous prime is 42015032123. The next prime is 42015032197. The reversal of 42015032161 is 16123051024.

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., 33133100625 + 8881931536 = 182025^2 + 94244^2 .

It is a cyclic number.

It is not a de Polignac number, because 42015032161 - 2³³ = 33425097569 is a prime.

It is not a weakly prime, because it can be changed into another prime (42015032261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21007516080 + 21007516081.

It is an arithmetic number, because the mean of its divisors is an integer number (21007516081).

Almost surely, 2^42015032161 is an apocalyptic number.

It is an amenable number.

42015032161 is a deficient number, since it is larger than the sum of its proper divisors (1).

42015032161 is an equidigital number, since it uses as much as digits as its factorization.

42015032161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 42015032161 its reverse (16123051024), we get a palindrome (58138083185).

The spelling of 42015032161 in words is "forty-two billion, fifteen million, thirty-two thousand, one hundred sixty-one".