161525526 has 16 divisors (see below), whose sum is σ = 323357184. Its totient is φ = 53790824.

The previous prime is 161525519. The next prime is 161525537. The reversal of 161525526 is 625525161.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5586 + ... + 18821.

It is an arithmetic number, because the mean of its divisors is an integer number (20209824).

Almost surely, 2^161525526 is an apocalyptic number.

161525526 is an abundant number, since it is smaller than the sum of its proper divisors (161831658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161525526 is a wasteful number, since it uses less digits than its factorization.

161525526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25515.

The product of its digits is 18000, while the sum is 33.

The square root of 161525526 is about 12709.2692944953. The cubic root of 161525526 is about 544.6034497154.

The spelling of 161525526 in words is "one hundred sixty-one million, five hundred twenty-five thousand, five hundred twenty-six".