20161015 has 8 divisors (see below), whose sum is σ = 27649440. Its totient is φ = 13824672.

The previous prime is 20161013. The next prime is 20161019. The reversal of 20161015 is 51016102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20161015 - 2¹ = 20161013 is a prime.

It is a super-3 number, since 3×20161015³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20161015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20161013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287980 + ... + 288049.

It is an arithmetic number, because the mean of its divisors is an integer number (3456180).

Almost surely, 2^20161015 is an apocalyptic number.

20161015 is a deficient number, since it is larger than the sum of its proper divisors (7488425).

20161015 is an equidigital number, since it uses as much as digits as its factorization.

20161015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576041.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 20161015 is about 4490.1018919396. The cubic root of 20161015 is about 272.1682521233.

Adding to 20161015 its reverse (51016102), we get a palindrome (71177117).

It can be divided in two parts, 201 and 61015, that added together give a palindrome (61216).

The spelling of 20161015 in words is "twenty million, one hundred sixty-one thousand, fifteen".