31500425045 has 4 divisors (see below), whose sum is σ = 37800510060. Its totient is φ = 25200340032.

The previous prime is 31500425029. The next prime is 31500425053. The reversal of 31500425045 is 54052400513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54052400513 = 31 ⋅1743625823.

It can be written as a sum of positive squares in 2 ways, for example, as 21012821764 + 10487603281 = 144958^2 + 102409^2 .

It is a cyclic number.

It is not a de Polignac number, because 31500425045 - 2⁴ = 31500425029 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31500424999 and 31500425017.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3150042500 + ... + 3150042509.

It is an arithmetic number, because the mean of its divisors is an integer number (9450127515).

Almost surely, 2^31500425045 is an apocalyptic number.

It is an amenable number.

31500425045 is a deficient number, since it is larger than the sum of its proper divisors (6300085015).

31500425045 is an equidigital number, since it uses as much as digits as its factorization.

31500425045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6300085014.

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 31500425045 its reverse (54052400513), we get a palindrome (85552825558).

The spelling of 31500425045 in words is "thirty-one billion, five hundred million, four hundred twenty-five thousand, forty-five".