2012145523 has 4 divisors (see below), whose sum is σ = 2012592400. Its totient is φ = 2011698648.

The previous prime is 2012145497. The next prime is 2012145539. The reversal of 2012145523 is 3255412102.

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

It is a cyclic number.

It is not a de Polignac number, because 2012145523 - 2²¹ = 2010048371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2012140523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216615 + ... + 225712.

It is an arithmetic number, because the mean of its divisors is an integer number (503148100).

Almost surely, 2^2012145523 is an apocalyptic number.

2012145523 is a deficient number, since it is larger than the sum of its proper divisors (446877).

2012145523 is an equidigital number, since it uses as much as digits as its factorization.

2012145523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446876.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2012145523 is about 44856.9450921482. The cubic root of 2012145523 is about 1262.4663046002.

Adding to 2012145523 its reverse (3255412102), we get a palindrome (5267557625).

The spelling of 2012145523 in words is "two billion, twelve million, one hundred forty-five thousand, five hundred twenty-three".