2201312523 has 4 divisors (see below), whose sum is σ = 2935083368. Its totient is φ = 1467541680.

The previous prime is 2201312501. The next prime is 2201312527. The reversal of 2201312523 is 3252131022.

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

It is a de Polignac number, because none of the positive numbers 2^k-2201312523 is a prime.

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 2201312523.

It is not an unprimeable number, because it can be changed into a prime (2201312527) 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, 366885418 + ... + 366885423.

It is an arithmetic number, because the mean of its divisors is an integer number (733770842).

Almost surely, 2^2201312523 is an apocalyptic number.

2201312523 is a deficient number, since it is larger than the sum of its proper divisors (733770845).

2201312523 is an equidigital number, since it uses as much as digits as its factorization.

2201312523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733770844.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2201312523 is about 46918.1470542049. The cubic root of 2201312523 is about 1300.8500403094.

Adding to 2201312523 its reverse (3252131022), we get a palindrome (5453443545).

The spelling of 2201312523 in words is "two billion, two hundred one million, three hundred twelve thousand, five hundred twenty-three".