161340215 has 8 divisors (see below), whose sum is σ = 197261568. Its totient is φ = 126636640.

The previous prime is 161340209. The next prime is 161340227. The reversal of 161340215 is 512043161.

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

It is not a de Polignac number, because 161340215 - 2²⁰ = 160291639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304151 + ... + 304680.

It is an arithmetic number, because the mean of its divisors is an integer number (24657696).

Almost surely, 2^161340215 is an apocalyptic number.

161340215 is a deficient number, since it is larger than the sum of its proper divisors (35921353).

161340215 is an equidigital number, since it uses as much as digits as its factorization.

161340215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608889.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 161340215 is about 12701.9768146537. The cubic root of 161340215 is about 544.3951036394.

Adding to 161340215 its reverse (512043161), we get a palindrome (673383376).

The spelling of 161340215 in words is "one hundred sixty-one million, three hundred forty thousand, two hundred fifteen".