160121815 has 16 divisors (see below), whose sum is σ = 220193280. Its totient is φ = 109499040.

The previous prime is 160121803. The next prime is 160121821. The reversal of 160121815 is 518121061.

It is a happy number.

It is not a de Polignac number, because 160121815 - 2²³ = 151733207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 160121815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7230 + ... + 19300.

It is an arithmetic number, because the mean of its divisors is an integer number (13762080).

Almost surely, 2^160121815 is an apocalyptic number.

160121815 is a deficient number, since it is larger than the sum of its proper divisors (60071465).

160121815 is a wasteful number, since it uses less digits than its factorization.

160121815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12462.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 160121815 is about 12653.9248851888. The cubic root of 160121815 is about 543.0212620285.

Adding to 160121815 its reverse (518121061), we get a palindrome (678242876).

The spelling of 160121815 in words is "one hundred sixty million, one hundred twenty-one thousand, eight hundred fifteen".