161529525 has 48 divisors (see below), whose sum is σ = 301677120. Its totient is φ = 84715200.

The previous prime is 161529517. The next prime is 161529539. The reversal of 161529525 is 525925161.

It is not a de Polignac number, because 161529525 - 2³ = 161529517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161529525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39214 + ... + 43136.

It is an arithmetic number, because the mean of its divisors is an integer number (6284940).

Almost surely, 2^161529525 is an apocalyptic number.

161529525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161529525 is a deficient number, since it is larger than the sum of its proper divisors (140147595).

161529525 is a wasteful number, since it uses less digits than its factorization.

161529525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4003 (or 3992 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 161529525 is about 12709.4266196395. The cubic root of 161529525 is about 544.6079440540.

The spelling of 161529525 in words is "one hundred sixty-one million, five hundred twenty-nine thousand, five hundred twenty-five".