161423525 has 12 divisors (see below), whose sum is σ = 210700800. Its totient is φ = 122341680.

The previous prime is 161423491. The next prime is 161423527. The reversal of 161423525 is 525324161.

It is not a de Polignac number, because 161423525 - 2⁶ = 161423461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161423527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169445 + ... + 170394.

It is an arithmetic number, because the mean of its divisors is an integer number (17558400).

Almost surely, 2^161423525 is an apocalyptic number.

It is an amenable number.

161423525 is a deficient number, since it is larger than the sum of its proper divisors (49277275).

161423525 is a wasteful number, since it uses less digits than its factorization.

161423525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339868 (or 339863 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 161423525 is about 12705.2558022261. The cubic root of 161423525 is about 544.4887892136.

Adding to 161423525 its reverse (525324161), we get a palindrome (686747686).

The spelling of 161423525 in words is "one hundred sixty-one million, four hundred twenty-three thousand, five hundred twenty-five".