31145053005520 has 80 divisors (see below), whose sum is σ = 76224699432000. Its totient is φ = 11802137647104.

The previous prime is 31145053005509. The next prime is 31145053005559. The reversal of 31145053005520 is 2550035054113.

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

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, 116266296 + ... + 116533864.

It is an arithmetic number, because the mean of its divisors is an integer number (952808742900).

Almost surely, 2^{31145053005520} is an apocalyptic number.

It is an amenable number.

31145053005520 is an abundant number, since it is smaller than the sum of its proper divisors (45079646426480).

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

31145053005520 is a wasteful number, since it uses less digits than its factorization.

31145053005520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344180 (or 344174 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

Adding to 31145053005520 its reverse (2550035054113), we get a palindrome (33695088059633).

The spelling of 31145053005520 in words is "thirty-one trillion, one hundred forty-five billion, fifty-three million, five thousand, five hundred twenty".