2151636 has 24 divisors (see below), whose sum is σ = 5285280. Its totient is φ = 679392.

The previous prime is 2151629. The next prime is 2151637. The reversal of 2151636 is 6361512.

It is a super-3 number, since 3×2151636³ = 29883238493333842368, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4491 + ... + 4946.

It is an arithmetic number, because the mean of its divisors is an integer number (220220).

2^2151636 is an apocalyptic number.

It is an amenable number.

2151636 is an abundant number, since it is smaller than the sum of its proper divisors (3133644).

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

2151636 is a wasteful number, since it uses less digits than its factorization.

2151636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9463 (or 9461 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 2151636 is about 1466.8455951463. The cubic root of 2151636 is about 129.0990165810.

The spelling of 2151636 in words is "two million, one hundred fifty-one thousand, six hundred thirty-six".