2523212305 has 4 divisors (see below), whose sum is σ = 3027854772. Its totient is φ = 2018569840.

The previous prime is 2523212303. The next prime is 2523212359. The reversal of 2523212305 is 5032123252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 866478096 + 1656734209 = 29436^2 + 40703^2 .

It is not a de Polignac number, because 2523212305 - 2¹ = 2523212303 is a prime.

It is a super-2 number, since 2×2523212305² = 12733200672206826050, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2523212305.

It is not an unprimeable number, because it can be changed into a prime (2523212303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252321226 + ... + 252321235.

It is an arithmetic number, because the mean of its divisors is an integer number (756963693).

Almost surely, 2^2523212305 is an apocalyptic number.

It is an amenable number.

2523212305 is a deficient number, since it is larger than the sum of its proper divisors (504642467).

2523212305 is an equidigital number, since it uses as much as digits as its factorization.

2523212305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504642466.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 2523212305 is about 50231.5867258839. The cubic root of 2523212305 is about 1361.3964004012.

Adding to 2523212305 its reverse (5032123252), we get a palindrome (7555335557).

The spelling of 2523212305 in words is "two billion, five hundred twenty-three million, two hundred twelve thousand, three hundred five".