161301506 has 8 divisors (see below), whose sum is σ = 242157324. Its totient is φ = 80582400.

The previous prime is 161301499. The next prime is 161301521. The reversal of 161301506 is 605103161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 122301481 + 39000025 = 11059^2 + 6245^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31175 + ... + 35978.

Almost surely, 2^161301506 is an apocalyptic number.

161301506 is a deficient number, since it is larger than the sum of its proper divisors (80855818).

161301506 is a wasteful number, since it uses less digits than its factorization.

161301506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68356.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 161301506 is about 12700.4529840475. The cubic root of 161301506 is about 544.3515627785.

Adding to 161301506 its reverse (605103161), we get a palindrome (766404667).

The spelling of 161301506 in words is "one hundred sixty-one million, three hundred one thousand, five hundred six".