161612315 has 4 divisors (see below), whose sum is σ = 193934784. Its totient is φ = 129289848.

The previous prime is 161612303. The next prime is 161612327. The reversal of 161612315 is 513216161.

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

It is an interprime number because it is at equal distance from previous prime (161612303) and next prime (161612327).

It is a cyclic number.

It is not a de Polignac number, because 161612315 - 2¹⁰ = 161611291 is a prime.

It is a super-3 number, since 3×161612315³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 16161227 + ... + 16161236.

It is an arithmetic number, because the mean of its divisors is an integer number (48483696).

Almost surely, 2^161612315 is an apocalyptic number.

161612315 is a deficient number, since it is larger than the sum of its proper divisors (32322469).

161612315 is an equidigital number, since it uses as much as digits as its factorization.

161612315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32322468.

The product of its digits is 1080, while the sum is 26.

The square root of 161612315 is about 12712.6832336844. The cubic root of 161612315 is about 544.7009722290.

Adding to 161612315 its reverse (513216161), we get a palindrome (674828476).

It can be divided in two parts, 1616 and 12315, that added together give a palindrome (13931).

The spelling of 161612315 in words is "one hundred sixty-one million, six hundred twelve thousand, three hundred fifteen".