16212387 has 4 divisors (see below), whose sum is σ = 21616520. Its totient is φ = 10808256.

The previous prime is 16212379. The next prime is 16212389. The reversal of 16212387 is 78321261.

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

It is not a de Polignac number, because 16212387 - 2³ = 16212379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16212389) 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, 2702062 + ... + 2702067.

It is an arithmetic number, because the mean of its divisors is an integer number (5404130).

Almost surely, 2^16212387 is an apocalyptic number.

16212387 is a deficient number, since it is larger than the sum of its proper divisors (5404133).

16212387 is an equidigital number, since it uses as much as digits as its factorization.

16212387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5404132.

The product of its digits is 4032, while the sum is 30.

The square root of 16212387 is about 4026.4608529079. The cubic root of 16212387 is about 253.0942745208.

The spelling of 16212387 in words is "sixteen million, two hundred twelve thousand, three hundred eighty-seven".