240551 has 2 divisors, whose sum is σ = 240552. Its totient is φ = 240550.

The previous prime is 240517. The next prime is 240571. The reversal of 240551 is 155042.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240551 - 2¹⁰ = 239527 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 240551.

It is not a weakly prime, because it can be changed into another prime (240571) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120275 + 120276.

It is an arithmetic number, because the mean of its divisors is an integer number (120276).

2²⁴⁰⁵⁵¹ is an apocalyptic number.

240551 is a deficient number, since it is larger than the sum of its proper divisors (1).

240551 is an equidigital number, since it uses as much as digits as its factorization.

240551 is an evil number, because the sum of its binary digits is even.

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

The square root of 240551 is about 490.4599881744. The cubic root of 240551 is about 62.1921716902.

Adding to 240551 its reverse (155042), we get a palindrome (395593).

The spelling of 240551 in words is "two hundred forty thousand, five hundred fifty-one".