2151616 has 14 divisors (see below), whose sum is σ = 4269740. Its totient is φ = 1075776.

The previous prime is 2151607. The next prime is 2151619. The reversal of 2151616 is 6161512.

It is a super-3 number, since 3×2151616³ = 29882405184333938688, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (2151619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16746 + ... + 16873.

2^2151616 is an apocalyptic number.

It is an amenable number.

2151616 is a deficient number, since it is larger than the sum of its proper divisors (2118124).

2151616 is an equidigital number, since it uses as much as digits as its factorization.

2151616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33631 (or 33621 counting only the distinct ones).

The product of its digits is 360, while the sum is 22.

The square root of 2151616 is about 1466.8387777803. The cubic root of 2151616 is about 129.0986165771.

The spelling of 2151616 in words is "two million, one hundred fifty-one thousand, six hundred sixteen".