2687551 has 2 divisors, whose sum is σ = 2687552. Its totient is φ = 2687550.

The previous prime is 2687549. The next prime is 2687557. The reversal of 2687551 is 1557862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2687551 - 2¹ = 2687549 is a prime.

Together with 2687549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2687557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1343775 + 1343776.

It is an arithmetic number, because the mean of its divisors is an integer number (1343776).

2^2687551 is an apocalyptic number.

2687551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2687551 is an equidigital number, since it uses as much as digits as its factorization.

2687551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 34.

The square root of 2687551 is about 1639.3751858559. The cubic root of 2687551 is about 139.0333236185.

The spelling of 2687551 in words is "two million, six hundred eighty-seven thousand, five hundred fifty-one".