2649551 has 2 divisors, whose sum is σ = 2649552. Its totient is φ = 2649550.

The previous prime is 2649547. The next prime is 2649553. The reversal of 2649551 is 1559462.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2649551 - 2² = 2649547 is a prime.

Together with 2649553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2649553) 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, 1324775 + 1324776.

It is an arithmetic number, because the mean of its divisors is an integer number (1324776).

2^2649551 is an apocalyptic number.

2649551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2649551 is an equidigital number, since it uses as much as digits as its factorization.

2649551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 32.

The square root of 2649551 is about 1627.7441445141. The cubic root of 2649551 is about 138.3749343438.

The spelling of 2649551 in words is "two million, six hundred forty-nine thousand, five hundred fifty-one".