2400551 has 2 divisors, whose sum is σ = 2400552. Its totient is φ = 2400550.

The previous prime is 2400521. The next prime is 2400557. The reversal of 2400551 is 1550042.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2400551 - 2¹⁸ = 2138407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2400557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1200275 + 1200276.

It is an arithmetic number, because the mean of its divisors is an integer number (1200276).

2^2400551 is an apocalyptic number.

2400551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2400551 is an equidigital number, since it uses as much as digits as its factorization.

2400551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 2400551 is about 1549.3711627625. The cubic root of 2400551 is about 133.8968352756.

Adding to 2400551 its reverse (1550042), we get a palindrome (3950593).

The spelling of 2400551 in words is "two million, four hundred thousand, five hundred fifty-one".