31513201125 has 128 divisors (see below), whose sum is σ = 62134026240. Its totient is φ = 13880160000.

The previous prime is 31513201123. The next prime is 31513201129. The reversal of 31513201125 is 52110231513.

It is not a de Polignac number, because 31513201125 - 2¹ = 31513201123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31513201095 and 31513201104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31513201123) 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 127 ways as a sum of consecutive naturals, for example, 22051911 + ... + 22053339.

It is an arithmetic number, because the mean of its divisors is an integer number (485422080).

Almost surely, 2^31513201125 is an apocalyptic number.

31513201125 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31513201125 is a deficient number, since it is larger than the sum of its proper divisors (30620825115).

31513201125 is a wasteful number, since it uses less digits than its factorization.

31513201125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756 (or 1746 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 31513201125 its reverse (52110231513), we get a palindrome (83623432638).

The spelling of 31513201125 in words is "thirty-one billion, five hundred thirteen million, two hundred one thousand, one hundred twenty-five".