2546221247 has 4 divisors (see below), whose sum is σ = 2546366040. Its totient is φ = 2546076456.

The previous prime is 2546221243. The next prime is 2546221259. The reversal of 2546221247 is 7421226452.

2546221247 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 2546221247 - 2² = 2546221243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2546221243) 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, 41672 + ... + 82637.

It is an arithmetic number, because the mean of its divisors is an integer number (636591510).

Almost surely, 2^2546221247 is an apocalyptic number.

2546221247 is a deficient number, since it is larger than the sum of its proper divisors (144793).

2546221247 is a wasteful number, since it uses less digits than its factorization.

2546221247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144792.

The product of its digits is 53760, while the sum is 35.

The square root of 2546221247 is about 50460.0955904762. The cubic root of 2546221247 is about 1365.5220349817.

Adding to 2546221247 its reverse (7421226452), we get a palindrome (9967447699).

The spelling of 2546221247 in words is "two billion, five hundred forty-six million, two hundred twenty-one thousand, two hundred forty-seven".