161502040213 has 2 divisors, whose sum is σ = 161502040214. Its totient is φ = 161502040212.

The previous prime is 161502040207. The next prime is 161502040229. The reversal of 161502040213 is 312040205161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118561082929 + 42940957284 = 344327^2 + 207222^2 .

It is a cyclic number.

It is not a de Polignac number, because 161502040213 - 2⁵ = 161502040181 is a prime.

It is a super-2 number, since 2×161502040213² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161502040283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80751020106 + 80751020107.

It is an arithmetic number, because the mean of its divisors is an integer number (80751020107).

Almost surely, 2^161502040213 is an apocalyptic number.

It is an amenable number.

161502040213 is a deficient number, since it is larger than the sum of its proper divisors (1).

161502040213 is an equidigital number, since it uses as much as digits as its factorization.

161502040213 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 161502040213 its reverse (312040205161), we get a palindrome (473542245374).

The spelling of 161502040213 in words is "one hundred sixty-one billion, five hundred two million, forty thousand, two hundred thirteen".