2131650 has 48 divisors (see below), whose sum is σ = 5877600. Its totient is φ = 568080.

The previous prime is 2131627. The next prime is 2131651. The reversal of 2131650 is 561312.

2131650 is a `hidden beast` number, since 2 + 13 + 1 + 650 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2131651) 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 in 23 ways as a sum of consecutive naturals, for example, 561 + ... + 2139.

It is an arithmetic number, because the mean of its divisors is an integer number (122450).

2^2131650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2131650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2938800).

2131650 is an abundant number, since it is smaller than the sum of its proper divisors (3745950).

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

2131650 is a wasteful number, since it uses less digits than its factorization.

2131650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600 (or 1589 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2131650 is about 1460.0171231873. The cubic root of 2131650 is about 128.6980498615.

Adding to 2131650 its reverse (561312), we get a palindrome (2692962).

The spelling of 2131650 in words is "two million, one hundred thirty-one thousand, six hundred fifty".