16051987 has 4 divisors (see below), whose sum is σ = 18345136. Its totient is φ = 13758840.

The previous prime is 16051949. The next prime is 16051991. The reversal of 16051987 is 78915061.

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

It is a cyclic number.

It is not a de Polignac number, because 16051987 - 2¹¹ = 16049939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16051687) 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, 1146564 + ... + 1146577.

It is an arithmetic number, because the mean of its divisors is an integer number (4586284).

Almost surely, 2^16051987 is an apocalyptic number.

16051987 is a deficient number, since it is larger than the sum of its proper divisors (2293149).

16051987 is an equidigital number, since it uses as much as digits as its factorization.

16051987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293148.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 16051987 is about 4006.4931049485. The cubic root of 16051987 is about 252.2568295762.

The spelling of 16051987 in words is "sixteen million, fifty-one thousand, nine hundred eighty-seven".