2545525521 has 80 divisors (see below), whose sum is σ = 4781470848. Its totient is φ = 1321958880.

The previous prime is 2545525511. The next prime is 2545525531. The reversal of 2545525521 is 1255255452.

2545525521 is a `hidden beast` number, since 2 + 54 + 5 + 52 + 552 + 1 = 666.

2545525521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2545525511) and next prime (2545525531).

It is not a de Polignac number, because 2545525521 - 2¹⁴ = 2545509137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2545525501) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 752991 + ... + 756363.

Almost surely, 2^2545525521 is an apocalyptic number.

2545525521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2545525521 is a deficient number, since it is larger than the sum of its proper divisors (2235945327).

2545525521 is an equidigital number, since it uses as much as digits as its factorization.

2545525521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425 (or 3394 counting only the distinct ones).

The product of its digits is 100000, while the sum is 36.

The square root of 2545525521 is about 50453.2012958544. The cubic root of 2545525521 is about 1365.3976525299.

The spelling of 2545525521 in words is "two billion, five hundred forty-five million, five hundred twenty-five thousand, five hundred twenty-one".