161525162 has 4 divisors (see below), whose sum is σ = 242287746. Its totient is φ = 80762580.

The previous prime is 161525149. The next prime is 161525171. The reversal of 161525162 is 261525161.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 158281561 + 3243601 = 12581^2 + 1801^2 .

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 as a sum of consecutive naturals, namely, 40381289 + ... + 40381292.

Almost surely, 2^161525162 is an apocalyptic number.

161525162 is a deficient number, since it is larger than the sum of its proper divisors (80762584).

161525162 is an equidigital number, since it uses as much as digits as its factorization.

161525162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80762583.

The product of its digits is 3600, while the sum is 29.

The square root of 161525162 is about 12709.2549742304. The cubic root of 161525162 is about 544.6030406246.

Subtracting 161525162 from its reverse (261525161), we obtain a palindrome (99999999).

The spelling of 161525162 in words is "one hundred sixty-one million, five hundred twenty-five thousand, one hundred sixty-two".