31030325521025 has 6 divisors (see below), whose sum is σ = 38477603646102. Its totient is φ = 24824260416800.

The previous prime is 31030325520979. The next prime is 31030325521049. The reversal of 31030325521025 is 52012552303013.

It can be written as a sum of positive squares in 3 ways, for example, as 9340431788944 + 21689893732081 = 3056212^2 + 4657241^2 .

It is not a de Polignac number, because 31030325521025 - 2¹² = 31030325516929 is a prime.

It is a super-2 number, since 2×31030325521025² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31030325520982 and 31030325521000.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 620606510396 + ... + 620606510445.

It is an arithmetic number, because the mean of its divisors is an integer number (6412933941017).

Almost surely, 2^{31030325521025} is an apocalyptic number.

It is an amenable number.

31030325521025 is a deficient number, since it is larger than the sum of its proper divisors (7447278125077).

31030325521025 is a wasteful number, since it uses less digits than its factorization.

31030325521025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241213020851 (or 1241213020846 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

Adding to 31030325521025 its reverse (52012552303013), we get a palindrome (83042877824038).

The spelling of 31030325521025 in words is "thirty-one trillion, thirty billion, three hundred twenty-five million, five hundred twenty-one thousand, twenty-five".