161559575 has 12 divisors (see below), whose sum is σ = 205749480. Its totient is φ = 125753760.

The previous prime is 161559571. The next prime is 161559589. The reversal of 161559575 is 575955161.

It is not a de Polignac number, because 161559575 - 2² = 161559571 is a prime.

It is a super-2 number, since 2×161559575² = 52202992548361250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161559571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86405 + ... + 88254.

It is an arithmetic number, because the mean of its divisors is an integer number (17145790).

Almost surely, 2^161559575 is an apocalyptic number.

161559575 is a deficient number, since it is larger than the sum of its proper divisors (44189905).

161559575 is a wasteful number, since it uses less digits than its factorization.

161559575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174706 (or 174701 counting only the distinct ones).

The product of its digits is 236250, while the sum is 44.

The square root of 161559575 is about 12710.6087580414. The cubic root of 161559575 is about 544.6417138431.

The spelling of 161559575 in words is "one hundred sixty-one million, five hundred fifty-nine thousand, five hundred seventy-five".