1531232312240 has 40 divisors (see below), whose sum is σ = 3560659790688. Its totient is φ = 612399219200.

The previous prime is 1531232312237. The next prime is 1531232312257. The reversal of 1531232312240 is 422132321351.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 936797 + ... + 1984956.

Almost surely, 2^{1531232312240} is an apocalyptic number.

1531232312240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1531232312240 is an abundant number, since it is smaller than the sum of its proper divisors (2029427478448).

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

1531232312240 is a wasteful number, since it uses less digits than its factorization.

1531232312240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928317 (or 2928311 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 1531232312240 its reverse (422132321351), we get a palindrome (1953364633591).

The spelling of 1531232312240 in words is "one trillion, five hundred thirty-one billion, two hundred thirty-two million, three hundred twelve thousand, two hundred forty".