2131626 has 16 divisors (see below), whose sum is σ = 4872384. Its totient is φ = 609024.

The previous prime is 2131609. The next prime is 2131627. The reversal of 2131626 is 6261312.

2131626 = T₂₂₈ + T₂₂₉ + ... + T₂₉₀.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2131627) 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, 25335 + ... + 25418.

It is an arithmetic number, because the mean of its divisors is an integer number (304524).

2^2131626 is an apocalyptic number.

2131626 is an abundant number, since it is smaller than the sum of its proper divisors (2740758).

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

2131626 is a wasteful number, since it uses less digits than its factorization.

2131626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50765.

The product of its digits is 432, while the sum is 21.

The square root of 2131626 is about 1460.0089040824. The cubic root of 2131626 is about 128.6975668609.

Adding to 2131626 its reverse (6261312), we get a palindrome (8392938).

The spelling of 2131626 in words is "two million, one hundred thirty-one thousand, six hundred twenty-six".