2565235401 has 4 divisors (see below), whose sum is σ = 3420313872. Its totient is φ = 1710156932.

The previous prime is 2565235381. The next prime is 2565235411. The reversal of 2565235401 is 1045325652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2565235401 - 2⁷ = 2565235273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2565235411) 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, 427539231 + ... + 427539236.

It is an arithmetic number, because the mean of its divisors is an integer number (855078468).

Almost surely, 2^2565235401 is an apocalyptic number.

It is an amenable number.

2565235401 is a deficient number, since it is larger than the sum of its proper divisors (855078471).

2565235401 is an equidigital number, since it uses as much as digits as its factorization.

2565235401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855078470.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 2565235401 is about 50648.1529870537. The cubic root of 2565235401 is about 1368.9126650405.

The spelling of 2565235401 in words is "two billion, five hundred sixty-five million, two hundred thirty-five thousand, four hundred one".