2561242425 has 48 divisors (see below), whose sum is σ = 4848356352. Its totient is φ = 1168718400.

The previous prime is 2561242421. The next prime is 2561242459. The reversal of 2561242425 is 5242421652.

2561242425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2561242425 - 2² = 2561242421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2561242421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 304020 + ... + 312330.

It is an arithmetic number, because the mean of its divisors is an integer number (101007424).

Almost surely, 2^2561242425 is an apocalyptic number.

2561242425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2561242425 is a deficient number, since it is larger than the sum of its proper divisors (2287113927).

2561242425 is a wasteful number, since it uses less digits than its factorization.

2561242425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8918 (or 8913 counting only the distinct ones).

The product of its digits is 38400, while the sum is 33.

The square root of 2561242425 is about 50608.7188634528. The cubic root of 2561242425 is about 1368.2020253899.

The spelling of 2561242425 in words is "two billion, five hundred sixty-one million, two hundred forty-two thousand, four hundred twenty-five".