2545720423 has 2 divisors, whose sum is σ = 2545720424. Its totient is φ = 2545720422.

The previous prime is 2545720421. The next prime is 2545720451. The reversal of 2545720423 is 3240275452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2545720423 - 2¹ = 2545720421 is a prime.

Together with 2545720421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2545720421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272860211 + 1272860212.

It is an arithmetic number, because the mean of its divisors is an integer number (1272860212).

Almost surely, 2^2545720423 is an apocalyptic number.

2545720423 is a deficient number, since it is larger than the sum of its proper divisors (1).

2545720423 is an equidigital number, since it uses as much as digits as its factorization.

2545720423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 34.

The square root of 2545720423 is about 50455.1327716021. The cubic root of 2545720423 is about 1365.4324995506.

Adding to 2545720423 its reverse (3240275452), we get a palindrome (5785995875).

The spelling of 2545720423 in words is "two billion, five hundred forty-five million, seven hundred twenty thousand, four hundred twenty-three".