2561053531 has 4 divisors (see below), whose sum is σ = 2630271232. Its totient is φ = 2491835832.

The previous prime is 2561053513. The next prime is 2561053541. The reversal of 2561053531 is 1353501652.

2561053531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2561053531 - 2⁷ = 2561053403 is a prime.

It is a super-2 number, since 2×2561053531² = 13117990377295135922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2561053493 and 2561053502.

It is not an unprimeable number, because it can be changed into a prime (2561053511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34608795 + ... + 34608868.

It is an arithmetic number, because the mean of its divisors is an integer number (657567808).

Almost surely, 2^2561053531 is an apocalyptic number.

2561053531 is a deficient number, since it is larger than the sum of its proper divisors (69217701).

2561053531 is an equidigital number, since it uses as much as digits as its factorization.

2561053531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69217700.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 2561053531 is about 50606.8526091082. The cubic root of 2561053531 is about 1368.1683891744.

The spelling of 2561053531 in words is "two billion, five hundred sixty-one million, fifty-three thousand, five hundred thirty-one".