1240311331530 has 48 divisors (see below), whose sum is σ = 3414504140424. Its totient is φ = 311293824000.

The previous prime is 1240311331517. The next prime is 1240311331561. The reversal of 1240311331530 is 351331130421.

1240311331530 is a `hidden beast` number, since 1 + 2 + 4 + 0 + 311 + 3 + 315 + 30 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1129316412249 + 110994919281 = 1062693^2 + 333159^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1240311331494 and 1240311331503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 405328971 + ... + 405332030.

Almost surely, 2^{1240311331530} is an apocalyptic number.

1240311331530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1240311331530 is an abundant number, since it is smaller than the sum of its proper divisors (2174192808894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1240311331530 is a wasteful number, since it uses less digits than its factorization.

1240311331530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810661031 (or 810661028 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

Adding to 1240311331530 its reverse (351331130421), we get a palindrome (1591642461951).

The spelling of 1240311331530 in words is "one trillion, two hundred forty billion, three hundred eleven million, three hundred thirty-one thousand, five hundred thirty".