1971043597320 has 256 divisors, whose sum is σ = 6872450849280. Its totient is φ = 442893312000.

The previous prime is 1971043597291. The next prime is 1971043597379. The reversal of 1971043597320 is 237953401791.

It is a super-2 number, since 2×1971043597320² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 102111670 + ... + 102130970.

It is an arithmetic number, because the mean of its divisors is an integer number (26845511130).

Almost surely, 2^{1971043597320} is an apocalyptic number.

1971043597320 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 1971043597320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3436225424640).

1971043597320 is an abundant number, since it is smaller than the sum of its proper divisors (4901407251960).

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

1971043597320 is a wasteful number, since it uses less digits than its factorization.

1971043597320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21376 (or 21372 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 51.

The spelling of 1971043597320 in words is "one trillion, nine hundred seventy-one billion, forty-three million, five hundred ninety-seven thousand, three hundred twenty".