161423533 has 2 divisors, whose sum is σ = 161423534. Its totient is φ = 161423532.

The previous prime is 161423527. The next prime is 161423539. The reversal of 161423533 is 335324161.

161423533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (161423527) and next prime (161423539).

It can be written as a sum of positive squares in only one way, i.e., 142396489 + 19027044 = 11933^2 + 4362^2 .

It is a cyclic number.

It is not a de Polignac number, because 161423533 - 2¹³ = 161415341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161423539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80711766 + 80711767.

It is an arithmetic number, because the mean of its divisors is an integer number (80711767).

Almost surely, 2^161423533 is an apocalyptic number.

It is an amenable number.

161423533 is a deficient number, since it is larger than the sum of its proper divisors (1).

161423533 is an equidigital number, since it uses as much as digits as its factorization.

161423533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 28.

The square root of 161423533 is about 12705.2561170564. The cubic root of 161423533 is about 544.4887982083.

Adding to 161423533 its reverse (335324161), we get a palindrome (496747694).

The spelling of 161423533 in words is "one hundred sixty-one million, four hundred twenty-three thousand, five hundred thirty-three".