240138555 has 32 divisors (see below), whose sum is σ = 403384320. Its totient is φ = 121827840.

The previous prime is 240138553. The next prime is 240138571. The reversal of 240138555 is 555831042.

240138555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 240138555 - 2¹ = 240138553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (240138553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23059 + ... + 31811.

It is an arithmetic number, because the mean of its divisors is an integer number (12605760).

Almost surely, 2^240138555 is an apocalyptic number.

240138555 is a deficient number, since it is larger than the sum of its proper divisors (163245765).

240138555 is a wasteful number, since it uses less digits than its factorization.

240138555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8851.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 240138555 is about 15496.4045829992. The cubic root of 240138555 is about 621.5660677957.

Adding to 240138555 its reverse (555831042), we get a palindrome (795969597).

The spelling of 240138555 in words is "two hundred forty million, one hundred thirty-eight thousand, five hundred fifty-five".