161330315 has 4 divisors (see below), whose sum is σ = 193596384. Its totient is φ = 129064248.

The previous prime is 161330297. The next prime is 161330339. The reversal of 161330315 is 513033161.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161330315 is a prime.

It is a Duffinian number.

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, 16133027 + ... + 16133036.

It is an arithmetic number, because the mean of its divisors is an integer number (48399096).

Almost surely, 2^161330315 is an apocalyptic number.

161330315 is a deficient number, since it is larger than the sum of its proper divisors (32266069).

161330315 is an equidigital number, since it uses as much as digits as its factorization.

161330315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32266068.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 161330315 is about 12701.5871055550. The cubic root of 161330315 is about 544.3839685322.

Adding to 161330315 its reverse (513033161), we get a palindrome (674363476).

It can be divided in two parts, 16 and 1330315, that added together give a palindrome (1330331).

The spelling of 161330315 in words is "one hundred sixty-one million, three hundred thirty thousand, three hundred fifteen".