2681431 has 4 divisors (see below), whose sum is σ = 2689864. Its totient is φ = 2673000.

The previous prime is 2681423. The next prime is 2681443. The reversal of 2681431 is 1341862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1341862 = 2 ⋅670931.

It is a cyclic number.

It is not a de Polignac number, because 2681431 - 2³ = 2681423 is a prime.

It is a super-2 number, since 2×2681431² = 14380144415522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2681396 and 2681405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2684431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3720 + ... + 4381.

It is an arithmetic number, because the mean of its divisors is an integer number (672466).

2^2681431 is an apocalyptic number.

2681431 is a deficient number, since it is larger than the sum of its proper divisors (8433).

2681431 is an equidigital number, since it uses as much as digits as its factorization.

2681431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8432.

The product of its digits is 1152, while the sum is 25.

The square root of 2681431 is about 1637.5075572345. The cubic root of 2681431 is about 138.9277094209.

It can be divided in two parts, 2681 and 431, that multiplied together give a palindrome (1155511).

The spelling of 2681431 in words is "two million, six hundred eighty-one thousand, four hundred thirty-one".