240554591 has 2 divisors, whose sum is σ = 240554592. Its totient is φ = 240554590.

The previous prime is 240554551. The next prime is 240554593. The reversal of 240554591 is 195455042.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240554591 - 2⁶ = 240554527 is a prime.

It is a super-2 number, since 2×240554591² = 115733022502354562, which contains 22 as substring.

Together with 240554593, 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 (240554593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120277295 + 120277296.

It is an arithmetic number, because the mean of its divisors is an integer number (120277296).

Almost surely, 2^240554591 is an apocalyptic number.

240554591 is a deficient number, since it is larger than the sum of its proper divisors (1).

240554591 is an equidigital number, since it uses as much as digits as its factorization.

240554591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 240554591 is about 15509.8224038833. The cubic root of 240554591 is about 621.9248116157.

The spelling of 240554591 in words is "two hundred forty million, five hundred fifty-four thousand, five hundred ninety-one".