31543020125 has 8 divisors (see below), whose sum is σ = 39365689272. Its totient is φ = 25234416000.

The previous prime is 31543020097. The next prime is 31543020127. The reversal of 31543020125 is 52102034513.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 446519161 + 31096500964 = 21131^2 + 176342^2 .

It is not a de Polignac number, because 31543020125 - 2²² = 31538825821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31543020094 and 31543020103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31543020127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126171956 + ... + 126172205.

It is an arithmetic number, because the mean of its divisors is an integer number (4920711159).

Almost surely, 2^31543020125 is an apocalyptic number.

It is an amenable number.

31543020125 is a deficient number, since it is larger than the sum of its proper divisors (7822669147).

31543020125 is an equidigital number, since it uses as much as digits as its factorization.

31543020125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252344176 (or 252344166 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 31543020125 its reverse (52102034513), we get a palindrome (83645054638).

The spelling of 31543020125 in words is "thirty-one billion, five hundred forty-three million, twenty thousand, one hundred twenty-five".