1231350522240 has 64 divisors (see below), whose sum is σ = 3924929795760. Its totient is φ = 328360138752.

The previous prime is 1231350522239. The next prime is 1231350522253. The reversal of 1231350522240 is 422250531321.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1231350522198 and 1231350522207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320662279 + ... + 320666118.

Almost surely, 2^{1231350522240} is an apocalyptic number.

1231350522240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231350522240 is an abundant number, since it is smaller than the sum of its proper divisors (2693579273520).

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

1231350522240 is an equidigital number, since it uses as much as digits as its factorization.

1231350522240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641328419 (or 641328407 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 1231350522240 in words is "one trillion, two hundred thirty-one billion, three hundred fifty million, five hundred twenty-two thousand, two hundred forty".