2166250 has 20 divisors (see below), whose sum is σ = 4062762. Its totient is φ = 866000.

The previous prime is 2166233. The next prime is 2166251. The reversal of 2166250 is 526612.

It can be written as a sum of positive squares in 5 ways, for example, as 14161 + 2152089 = 119^2 + 1467^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2166251) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 384 + ... + 2116.

2^2166250 is an apocalyptic number.

2166250 is a deficient number, since it is larger than the sum of its proper divisors (1896512).

2166250 is an equidigital number, since it uses as much as digits as its factorization.

2166250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755 (or 1740 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2166250 is about 1471.8186029535. The cubic root of 2166250 is about 129.3906392757.

It can be divided in two parts, 21662 and 50, that added together give a palindrome (21712).

The spelling of 2166250 in words is "two million, one hundred sixty-six thousand, two hundred fifty".