2236981 has 2 divisors, whose sum is σ = 2236982. Its totient is φ = 2236980.

The previous prime is 2236951. The next prime is 2236987. The reversal of 2236981 is 1896322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2056356 + 180625 = 1434^2 + 425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2236981 is a prime.

It is a super-2 number, since 2×2236981² = 10008167988722, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁷ + 2²¹ + 3⁵ + 6⁵ + 9³ + 8 + 1 .

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2236987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1118490 + 1118491.

It is an arithmetic number, because the mean of its divisors is an integer number (1118491).

2^2236981 is an apocalyptic number.

It is an amenable number.

2236981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2236981 is an equidigital number, since it uses as much as digits as its factorization.

2236981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 2236981 is about 1495.6540375368. The cubic root of 2236981 is about 130.7838441392.

The spelling of 2236981 in words is "two million, two hundred thirty-six thousand, nine hundred eighty-one".