240540511 has 4 divisors (see below), whose sum is σ = 241619392. Its totient is φ = 239461632.

The previous prime is 240540491. The next prime is 240540539. The reversal of 240540511 is 115045042.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 240540511 - 2⁵ = 240540479 is a prime.

It is a super-2 number, since 2×240540511² = 115719474864282242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240540541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539106 + ... + 539551.

It is an arithmetic number, because the mean of its divisors is an integer number (60404848).

Almost surely, 2^240540511 is an apocalyptic number.

240540511 is a deficient number, since it is larger than the sum of its proper divisors (1078881).

240540511 is a wasteful number, since it uses less digits than its factorization.

240540511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078880.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 240540511 is about 15509.3684913345. The cubic root of 240540511 is about 621.9126773330.

Adding to 240540511 its reverse (115045042), we get a palindrome (355585553).

The spelling of 240540511 in words is "two hundred forty million, five hundred forty thousand, five hundred eleven".