31145021421425 has 12 divisors (see below), whose sum is σ = 38634350837040. Its totient is φ = 24906646637520.

The previous prime is 31145021421391. The next prime is 31145021421457. The reversal of 31145021421425 is 52412412054113.

31145021421425 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 31145021421425 - 2³⁰ = 31143947679601 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234194687 + ... + 234327636.

It is an arithmetic number, because the mean of its divisors is an integer number (3219529236420).

Almost surely, 2^{31145021421425} is an apocalyptic number.

It is an amenable number.

31145021421425 is a deficient number, since it is larger than the sum of its proper divisors (7489329415615).

31145021421425 is a wasteful number, since it uses less digits than its factorization.

31145021421425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468524992 (or 468524987 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 31145021421425 its reverse (52412412054113), we get a palindrome (83557433475538).

The spelling of 31145021421425 in words is "thirty-one trillion, one hundred forty-five billion, twenty-one million, four hundred twenty-one thousand, four hundred twenty-five".