161418533 has 2 divisors, whose sum is σ = 161418534. Its totient is φ = 161418532.

The previous prime is 161418527. The next prime is 161418541. The reversal of 161418533 is 335814161.

161418533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160604929 + 813604 = 12673^2 + 902^2 .

It is an emirp because it is prime and its reverse (335814161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161418533 - 2²² = 157224229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161418533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161418563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80709266 + 80709267.

It is an arithmetic number, because the mean of its divisors is an integer number (80709267).

Almost surely, 2^161418533 is an apocalyptic number.

It is an amenable number.

161418533 is a deficient number, since it is larger than the sum of its proper divisors (1).

161418533 is an equidigital number, since it uses as much as digits as its factorization.

161418533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 161418533 is about 12705.0593465753. The cubic root of 161418533 is about 544.4831764091.

The spelling of 161418533 in words is "one hundred sixty-one million, four hundred eighteen thousand, five hundred thirty-three".