2012311545 has 16 divisors (see below), whose sum is σ = 3223186560. Its totient is φ = 1072070144.

The previous prime is 2012311541. The next prime is 2012311583. The reversal of 2012311545 is 5451132102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2012311545 - 2² = 2012311541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2012311541) 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 15 ways as a sum of consecutive naturals, for example, 58269 + ... + 86138.

It is an arithmetic number, because the mean of its divisors is an integer number (201449160).

Almost surely, 2^2012311545 is an apocalyptic number.

It is an amenable number.

2012311545 is a deficient number, since it is larger than the sum of its proper divisors (1210875015).

2012311545 is a wasteful number, since it uses less digits than its factorization.

2012311545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145344.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2012311545 is about 44858.7956258302. The cubic root of 2012311545 is about 1262.5010256502.

Adding to 2012311545 its reverse (5451132102), we get a palindrome (7463443647).

The spelling of 2012311545 in words is "two billion, twelve million, three hundred eleven thousand, five hundred forty-five".