161224115441 has 2 divisors, whose sum is σ = 161224115442. Its totient is φ = 161224115440.

The previous prime is 161224115431. The next prime is 161224115467. The reversal of 161224115441 is 144511422161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157387551841 + 3836563600 = 396721^2 + 61940^2 .

It is an emirp because it is prime and its reverse (144511422161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161224115441 - 2³⁴ = 144044246257 is a prime.

It is a super-3 number, since 3×161224115441³ (a number of 35 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161224115398 and 161224115407.

It is not a weakly prime, because it can be changed into another prime (161224115431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80612057720 + 80612057721.

It is an arithmetic number, because the mean of its divisors is an integer number (80612057721).

Almost surely, 2^161224115441 is an apocalyptic number.

It is an amenable number.

161224115441 is a deficient number, since it is larger than the sum of its proper divisors (1).

161224115441 is an equidigital number, since it uses as much as digits as its factorization.

161224115441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 32.

The spelling of 161224115441 in words is "one hundred sixty-one billion, two hundred twenty-four million, one hundred fifteen thousand, four hundred forty-one".