31304043432320 has 128 divisors (see below), whose sum is σ = 78886106604000. Its totient is φ = 11845850185728.

The previous prime is 31304043432317. The next prime is 31304043432371. The reversal of 31304043432320 is 2323434040313.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

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, 6805964 + ... + 10436916.

Almost surely, 2^{31304043432320} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31304043432320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39443053302000).

31304043432320 is an abundant number, since it is smaller than the sum of its proper divisors (47582063171680).

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

31304043432320 is a wasteful number, since it uses less digits than its factorization.

31304043432320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3631700 (or 3631688 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 32.

Adding to 31304043432320 its reverse (2323434040313), we get a palindrome (33627477472633).

The spelling of 31304043432320 in words is "thirty-one trillion, three hundred four billion, forty-three million, four hundred thirty-two thousand, three hundred twenty".