2115538533425 has 6 divisors (see below), whose sum is σ = 2623267781478. Its totient is φ = 1692430826720.

The previous prime is 2115538533421. The next prime is 2115538533439. The reversal of 2115538533425 is 5243358355112.

It can be written as a sum of positive squares in 3 ways, for example, as 32022386704 + 2083516146721 = 178948^2 + 1443439^2 .

It is not a de Polignac number, because 2115538533425 - 2² = 2115538533421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2115538533425.

It is not an unprimeable number, because it can be changed into a prime (2115538533421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42310770644 + ... + 42310770693.

It is an arithmetic number, because the mean of its divisors is an integer number (437211296913).

Almost surely, 2^{2115538533425} is an apocalyptic number.

2115538533425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2115538533425 is a deficient number, since it is larger than the sum of its proper divisors (507729248053).

2115538533425 is an equidigital number, since it uses as much as digits as its factorization.

2115538533425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84621541347 (or 84621541342 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 47.

The spelling of 2115538533425 in words is "two trillion, one hundred fifteen billion, five hundred thirty-eight million, five hundred thirty-three thousand, four hundred twenty-five".