31143101042320 has 20 divisors (see below), whose sum is σ = 72407709923580. Its totient is φ = 12457240416896.

The previous prime is 31143101042303. The next prime is 31143101042323. The reversal of 31143101042320 is 2324010134113.

It can be written as a sum of positive squares in 2 ways, for example, as 10279692790416 + 20863408251904 = 3206196^2 + 4567648^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (31143101042323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194644381435 + ... + 194644381594.

It is an arithmetic number, because the mean of its divisors is an integer number (3620385496179).

Almost surely, 2^{31143101042320} is an apocalyptic number.

It is an amenable number.

31143101042320 is an abundant number, since it is smaller than the sum of its proper divisors (41264608881260).

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

31143101042320 is a wasteful number, since it uses less digits than its factorization.

31143101042320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389288763042 (or 389288763036 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31143101042320 its reverse (2324010134113), we get a palindrome (33467111176433).

The spelling of 31143101042320 in words is "thirty-one trillion, one hundred forty-three billion, one hundred one million, forty-two thousand, three hundred twenty".