2187331 has 2 divisors, whose sum is σ = 2187332. Its totient is φ = 2187330.

The previous prime is 2187319. The next prime is 2187343. The reversal of 2187331 is 1337812.

It is a balanced prime because it is at equal distance from previous prime (2187319) and next prime (2187343).

It is a cyclic number.

It is not a de Polignac number, because 2187331 - 2¹³ = 2179139 is a prime.

It is a super-2 number, since 2×2187331² = 9568833807122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2187296 and 2187305.

It is not a weakly prime, because it can be changed into another prime (2187301) 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 as a sum of consecutive naturals, namely, 1093665 + 1093666.

It is an arithmetic number, because the mean of its divisors is an integer number (1093666).

2^2187331 is an apocalyptic number.

2187331 is a deficient number, since it is larger than the sum of its proper divisors (1).

2187331 is an equidigital number, since it uses as much as digits as its factorization.

2187331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 2187331 is about 1478.9628122438. The cubic root of 2187331 is about 129.8090094830.

It can be divided in two parts, 21873 and 31, that added together give a square (21904 = 148²).

The spelling of 2187331 in words is "two million, one hundred eighty-seven thousand, three hundred thirty-one".