4005215161 has 2 divisors, whose sum is σ = 4005215162. Its totient is φ = 4005215160.

The previous prime is 4005215131. The next prime is 4005215167. The reversal of 4005215161 is 1615125004.

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., 3412779561 + 592435600 = 58419^2 + 24340^2 .

It is a cyclic number.

It is not a de Polignac number, because 4005215161 - 2¹⁵ = 4005182393 is a prime.

It is not a weakly prime, because it can be changed into another prime (4005215167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2002607580 + 2002607581.

It is an arithmetic number, because the mean of its divisors is an integer number (2002607581).

Almost surely, 2^4005215161 is an apocalyptic number.

It is an amenable number.

4005215161 is a deficient number, since it is larger than the sum of its proper divisors (1).

4005215161 is an equidigital number, since it uses as much as digits as its factorization.

4005215161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 4005215161 is about 63286.7692412877. The cubic root of 4005215161 is about 1588.0906317040.

The spelling of 4005215161 in words is "four billion, five million, two hundred fifteen thousand, one hundred sixty-one".