161525105 has 8 divisors (see below), whose sum is σ = 221520192. Its totient is φ = 110760048.

The previous prime is 161525087. The next prime is 161525123. The reversal of 161525105 is 501525161.

It is an interprime number because it is at equal distance from previous prime (161525087) and next prime (161525123).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161525105 - 2²⁰ = 160476529 is a prime.

It is a super-2 number, since 2×161525105² = 52180719090522050, which contains 22 as substring.

It is a Duffinian 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, 2307467 + ... + 2307536.

It is an arithmetic number, because the mean of its divisors is an integer number (27690024).

Almost surely, 2^161525105 is an apocalyptic number.

It is an amenable number.

161525105 is a deficient number, since it is larger than the sum of its proper divisors (59995087).

161525105 is an equidigital number, since it uses as much as digits as its factorization.

161525105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4615015.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 161525105 is about 12709.2527317699. The cubic root of 161525105 is about 544.6029765636.

The spelling of 161525105 in words is "one hundred sixty-one million, five hundred twenty-five thousand, one hundred five".