31421031125 has 32 divisors (see below), whose sum is σ = 42797738880. Its totient is φ = 22841280000.

The previous prime is 31421031113. The next prime is 31421031127. The reversal of 31421031125 is 52113012413.

It is not a de Polignac number, because 31421031125 - 2⁸ = 31421030869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31421031125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421031127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4353770 + ... + 4360980.

It is an arithmetic number, because the mean of its divisors is an integer number (1337429340).

Almost surely, 2^31421031125 is an apocalyptic number.

It is an amenable number.

31421031125 is a deficient number, since it is larger than the sum of its proper divisors (11376707755).

31421031125 is a wasteful number, since it uses less digits than its factorization.

31421031125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10406 (or 10396 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 31421031125 its reverse (52113012413), we get a palindrome (83534043538).

The spelling of 31421031125 in words is "thirty-one billion, four hundred twenty-one million, thirty-one thousand, one hundred twenty-five".