2564431267 has 4 divisors (see below), whose sum is σ = 2565532800. Its totient is φ = 2563329736.

The previous prime is 2564431237. The next prime is 2564431271. The reversal of 2564431267 is 7621344652.

2564431267 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 2564431267 - 2⁷ = 2564431139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2564431237) 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, 547267 + ... + 551932.

It is an arithmetic number, because the mean of its divisors is an integer number (641383200).

Almost surely, 2^2564431267 is an apocalyptic number.

2564431267 is a deficient number, since it is larger than the sum of its proper divisors (1101533).

2564431267 is a wasteful number, since it uses less digits than its factorization.

2564431267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101532.

The product of its digits is 241920, while the sum is 40.

The square root of 2564431267 is about 50640.2139312227. The cubic root of 2564431267 is about 1368.7696106891.

The spelling of 2564431267 in words is "two billion, five hundred sixty-four million, four hundred thirty-one thousand, two hundred sixty-seven".