16015091 has 4 divisors (see below), whose sum is σ = 16061592. Its totient is φ = 15968592.

The previous prime is 16015079. The next prime is 16015093. The reversal of 16015091 is 19051061.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16015091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16015093) 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, 22730 + ... + 23423.

It is an arithmetic number, because the mean of its divisors is an integer number (4015398).

Almost surely, 2^16015091 is an apocalyptic number.

16015091 is a deficient number, since it is larger than the sum of its proper divisors (46501).

16015091 is an equidigital number, since it uses as much as digits as its factorization.

16015091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46500.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 16015091 is about 4001.8859304083. The cubic root of 16015091 is about 252.0634078704.

It can be divided in two parts, 160 and 15091, that added together give a palindrome (15251).

The spelling of 16015091 in words is "sixteen million, fifteen thousand, ninety-one".