2565525631 has 2 divisors, whose sum is σ = 2565525632. Its totient is φ = 2565525630.

The previous prime is 2565525619. The next prime is 2565525661. The reversal of 2565525631 is 1365255652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2565525631 - 2¹³ = 2565517439 is a prime.

It is a super-2 number, since 2×2565525631² = 13163843526635896322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2565525661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282762815 + 1282762816.

It is an arithmetic number, because the mean of its divisors is an integer number (1282762816).

Almost surely, 2^2565525631 is an apocalyptic number.

2565525631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565525631 is an equidigital number, since it uses as much as digits as its factorization.

2565525631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270000, while the sum is 40.

The square root of 2565525631 is about 50651.0180647931. The cubic root of 2565525631 is about 1368.9642892228.

The spelling of 2565525631 in words is "two billion, five hundred sixty-five million, five hundred twenty-five thousand, six hundred thirty-one".