31205424125225 has 24 divisors (see below), whose sum is σ = 44301092078400. Its totient is φ = 21359997933120.

The previous prime is 31205424125179. The next prime is 31205424125231. The reversal of 31205424125225 is 52252142450213.

It is not a de Polignac number, because 31205424125225 - 2²⁴ = 31205407348009 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 158264450 + ... + 158461499.

It is an arithmetic number, because the mean of its divisors is an integer number (1845878836600).

Almost surely, 2^{31205424125225} is an apocalyptic number.

31205424125225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31205424125225 is a deficient number, since it is larger than the sum of its proper divisors (13095667953175).

31205424125225 is a wasteful number, since it uses less digits than its factorization.

31205424125225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316726529 (or 316726524 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 31205424125225 its reverse (52252142450213), we get a palindrome (83457566575438).

The spelling of 31205424125225 in words is "thirty-one trillion, two hundred five billion, four hundred twenty-four million, one hundred twenty-five thousand, two hundred twenty-five".