2151235235425 has 6 divisors (see below), whose sum is σ = 2667531691958. Its totient is φ = 1720988188320.

The previous prime is 2151235235423. The next prime is 2151235235447. The reversal of 2151235235425 is 5245325321512.

It can be written as a sum of positive squares in 3 ways, for example, as 156160909584 + 1995074325841 = 395172^2 + 1412471^2 .

It is not a de Polignac number, because 2151235235425 - 2¹ = 2151235235423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151235235423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43024704684 + ... + 43024704733.

Almost surely, 2^{2151235235425} is an apocalyptic number.

2151235235425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2151235235425 is a deficient number, since it is larger than the sum of its proper divisors (516296456533).

2151235235425 is an equidigital number, since it uses as much as digits as its factorization.

2151235235425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86049409427 (or 86049409422 counting only the distinct ones).

The product of its digits is 360000, while the sum is 40.

The spelling of 2151235235425 in words is "two trillion, one hundred fifty-one billion, two hundred thirty-five million, two hundred thirty-five thousand, four hundred twenty-five".