161315027 has 4 divisors (see below), whose sum is σ = 164049240. Its totient is φ = 158580816.

The previous prime is 161315003. The next prime is 161315039. The reversal of 161315027 is 720513161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 720513161 = 21433 ⋅33617.

It is a cyclic number.

It is not a de Polignac number, because 161315027 - 2⁸ = 161314771 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161314987 and 161315005.

It is not an unprimeable number, because it can be changed into a prime (161315087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1367018 + ... + 1367135.

It is an arithmetic number, because the mean of its divisors is an integer number (41012310).

Almost surely, 2^161315027 is an apocalyptic number.

161315027 is a deficient number, since it is larger than the sum of its proper divisors (2734213).

161315027 is an equidigital number, since it uses as much as digits as its factorization.

161315027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734212.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 161315027 is about 12700.9852767413. The cubic root of 161315027 is about 544.3667723324.

Adding to 161315027 its reverse (720513161), we get a palindrome (881828188).

The spelling of 161315027 in words is "one hundred sixty-one million, three hundred fifteen thousand, twenty-seven".