2681951 has 2 divisors, whose sum is σ = 2681952. Its totient is φ = 2681950.

The previous prime is 2681929. The next prime is 2681969. The reversal of 2681951 is 1591862.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2681951 is a prime.

It is a super-2 number, since 2×2681951² = 14385722332802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2611951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340975 + 1340976.

It is an arithmetic number, because the mean of its divisors is an integer number (1340976).

2^2681951 is an apocalyptic number.

2681951 is a deficient number, since it is larger than the sum of its proper divisors (1).

2681951 is an equidigital number, since it uses as much as digits as its factorization.

2681951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 32.

The square root of 2681951 is about 1637.6663274306. Note that the first 3 decimals coincide. The cubic root of 2681951 is about 138.9366894195.

The spelling of 2681951 in words is "two million, six hundred eighty-one thousand, nine hundred fifty-one".