2012211523 has 4 divisors (see below), whose sum is σ = 2299670320. Its totient is φ = 1724752728.

The previous prime is 2012211521. The next prime is 2012211527. The reversal of 2012211523 is 3251122102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3251122102 = 2 ⋅1625561051.

It is a cyclic number.

It is not a de Polignac number, because 2012211523 - 2¹ = 2012211521 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 2012211523.

It is not an unprimeable number, because it can be changed into a prime (2012211521) 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, 143729388 + ... + 143729401.

It is an arithmetic number, because the mean of its divisors is an integer number (574917580).

Almost surely, 2^2012211523 is an apocalyptic number.

2012211523 is a deficient number, since it is larger than the sum of its proper divisors (287458797).

2012211523 is an equidigital number, since it uses as much as digits as its factorization.

2012211523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287458796.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2012211523 is about 44857.6807581489. The cubic root of 2012211523 is about 1262.4801077544.

Adding to 2012211523 its reverse (3251122102), we get a palindrome (5263333625).

The spelling of 2012211523 in words is "two billion, twelve million, two hundred eleven thousand, five hundred twenty-three".