1231500033040 has 80 divisors (see below), whose sum is σ = 2919286028736. Its totient is φ = 482970176000.

The previous prime is 1231500033019. The next prime is 1231500033083. The reversal of 1231500033040 is 403300051321.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6052155 + ... + 6252325.

Almost surely, 2^{1231500033040} is an apocalyptic number.

1231500033040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231500033040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1459643014368).

1231500033040 is an abundant number, since it is smaller than the sum of its proper divisors (1687785995696).

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

1231500033040 is a wasteful number, since it uses less digits than its factorization.

1231500033040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201688 (or 201682 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 1231500033040 its reverse (403300051321), we get a palindrome (1634800084361).

The spelling of 1231500033040 in words is "one trillion, two hundred thirty-one billion, five hundred million, thirty-three thousand, forty".