2521405723 has 2 divisors, whose sum is σ = 2521405724. Its totient is φ = 2521405722.

The previous prime is 2521405709. The next prime is 2521405771. The reversal of 2521405723 is 3275041252.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2521405723 is a prime.

It is not a weakly prime, because it can be changed into another prime (2521405703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260702861 + 1260702862.

It is an arithmetic number, because the mean of its divisors is an integer number (1260702862).

Almost surely, 2^2521405723 is an apocalyptic number.

2521405723 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521405723 is an equidigital number, since it uses as much as digits as its factorization.

2521405723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 2521405723 is about 50213.6009762295. The cubic root of 2521405723 is about 1361.0714097213.

Adding to 2521405723 its reverse (3275041252), we get a palindrome (5796446975).

The spelling of 2521405723 in words is "two billion, five hundred twenty-one million, four hundred five thousand, seven hundred twenty-three".