31540010125 has 16 divisors (see below), whose sum is σ = 42389775792. Its totient is φ = 23291083200.

The previous prime is 31540010123. The next prime is 31540010179. The reversal of 31540010125 is 52101004513.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 9724129321 + 21815880804 = 98611^2 + 147702^2 .

It is not a de Polignac number, because 31540010125 - 2¹ = 31540010123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31540010096 and 31540010105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31540010123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9702994 + ... + 9706243.

It is an arithmetic number, because the mean of its divisors is an integer number (2649360987).

Almost surely, 2^31540010125 is an apocalyptic number.

It is an amenable number.

31540010125 is a deficient number, since it is larger than the sum of its proper divisors (10849765667).

31540010125 is a wasteful number, since it uses less digits than its factorization.

31540010125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19409265 (or 19409255 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 31540010125 its reverse (52101004513), we get a palindrome (83641014638).

The spelling of 31540010125 in words is "thirty-one billion, five hundred forty million, ten thousand, one hundred twenty-five".