2157516 has 30 divisors (see below), whose sum is σ = 5641020. Its totient is φ = 719064.

The previous prime is 2157511. The next prime is 2157517. The reversal of 2157516 is 6157512.

2157516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 2157516.

It is not an unprimeable number, because it can be changed into a prime (2157511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3006 + ... + 3653.

It is an arithmetic number, because the mean of its divisors is an integer number (188034).

2^2157516 is an apocalyptic number.

It is an amenable number.

2157516 is an abundant number, since it is smaller than the sum of its proper divisors (3483504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2157516 is a wasteful number, since it uses less digits than its factorization.

2157516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6675 (or 6664 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 2157516 is about 1468.8485286101. The cubic root of 2157516 is about 129.2165103970.

The spelling of 2157516 in words is "two million, one hundred fifty-seven thousand, five hundred sixteen".