2381521795525 has 12 divisors (see below), whose sum is σ = 3054917614500. Its totient is φ = 1839520282880.

The previous prime is 2381521795501. The next prime is 2381521795577. The reversal of 2381521795525 is 5255971251832.

It is a Cunningham number, because it is equal to 1543218²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 1 + 2381521795524 = 1^2 + 1543218^2 .

It is not a de Polignac number, because 2381521795525 - 2⁷ = 2381521795397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1642428100 + ... + 1642429549.

It is an arithmetic number, because the mean of its divisors is an integer number (254576467875).

Almost surely, 2^{2381521795525} is an apocalyptic number.

2381521795525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2381521795525 is a deficient number, since it is larger than the sum of its proper divisors (673395818975).

2381521795525 is a wasteful number, since it uses less digits than its factorization.

2381521795525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3284857688 (or 3284857683 counting only the distinct ones).

The product of its digits is 7560000, while the sum is 55.

The spelling of 2381521795525 in words is "two trillion, three hundred eighty-one billion, five hundred twenty-one million, seven hundred ninety-five thousand, five hundred twenty-five".