2188061 has 2 divisors, whose sum is σ = 2188062. Its totient is φ = 2188060.

The previous prime is 2188049. The next prime is 2188099. The reversal of 2188061 is 1608812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1907161 + 280900 = 1381^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 2188061 - 2¹⁰ = 2187037 is a prime.

It is a super-2 number, since 2×2188061² = 9575221879442, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2188061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2188001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094030 + 1094031.

It is an arithmetic number, because the mean of its divisors is an integer number (1094031).

2^2188061 is an apocalyptic number.

It is an amenable number.

2188061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188061 is an equidigital number, since it uses as much as digits as its factorization.

2188061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 2188061 is about 1479.2095862318. The cubic root of 2188061 is about 129.8234486994.

The spelling of 2188061 in words is "two million, one hundred eighty-eight thousand, sixty-one".