1240331105523 has 4 divisors (see below), whose sum is σ = 1653774807368. Its totient is φ = 826887403680.

The previous prime is 1240331105501. The next prime is 1240331105569. The reversal of 1240331105523 is 3255011330421.

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

It is not a de Polignac number, because 1240331105523 - 2⁶ = 1240331105459 is a prime.

It is a super-2 number, since 2×1240331105523² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240331105723) 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, 206721850918 + ... + 206721850923.

It is an arithmetic number, because the mean of its divisors is an integer number (413443701842).

Almost surely, 2^{1240331105523} is an apocalyptic number.

1240331105523 is a deficient number, since it is larger than the sum of its proper divisors (413443701845).

1240331105523 is an equidigital number, since it uses as much as digits as its factorization.

1240331105523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413443701844.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 1240331105523 its reverse (3255011330421), we get a palindrome (4495342435944).

The spelling of 1240331105523 in words is "one trillion, two hundred forty billion, three hundred thirty-one million, one hundred five thousand, five hundred twenty-three".